All fishes reported from Argentina
n = 1110 (Incomplete)
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Dangerous Reef-associated Pelagic Deep-water Game fishes Commercial

Table 1: 1012 species currently present in the country/island (endemic, native, introduced, reintroduced);
Table 2: 82 species possibly present in the country/island (stray, questionable);
Table 3: 16 species demonstrated to be absent in the country/island (extirpated, not established, misidentification, error).
Table 4: 1110 species reported from the country/island altogether.
Table 1: 1012 species currently present in the country/island.
     
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Order Family Species Occurrence FishBase name Name
Characiformes Anostomidae Abramites hypselonotusnative Marbled headstander Jikii 
Perciformes Serranidae Acanthistius brasilianusnative Argentine seabass Mero 
Perciformes Serranidae Acanthistius patachonicusnative  Mero 
Tetraodontiformes Ostraciidae Acanthostracion quadricornisnative Scrawled cowfish  
Characiformes Acestrorhynchidae Acestrorhynchus lacustrisnative  dientudo 
Characiformes Acestrorhynchidae Acestrorhynchus pantaneironative  dientudo 
Pleuronectiformes Achiropsettidae Achiropsetta tricholepisnative Prickly flounder Lenguado 
Pleuronectiformes Achiridae Achirus lineatusnative Lined sole  
Characiformes Characidae Acrobrycon ipanquianusnative  Mojarra 
Siluriformes Auchenipteridae Ageneiosus inermisnative Manduba  
Siluriformes Auchenipteridae Ageneiosus marmoratusnative Bottlenose catfish  
Siluriformes Auchenipteridae Ageneiosus militarisnative   
Siluriformes Auchenipteridae Ageneiosus ucayalensisnative   
Scorpaeniformes Agonidae Agonopsis asperoculisnative   
Scorpaeniformes Agonidae Agonopsis chiloensisnative Snailfish Aayakich 
Lampriformes Regalecidae Agrostichthys parkerinative Streamer fish  
Aulopiformes Notosudidae Ahliesaurus berryinative   
Perciformes Zoarcidae Aiakas krefftinative   
Perciformes Zoarcidae Aiakas zinorumnative   
Aulopiformes Alepisauridae Alepisaurus brevirostrisnative Short snouted lancetfish  
Osmeriformes Alepocephalidae Alepocephalus productusnative Smalleye smooth-head  
Zeiformes Oreosomatidae Allocyttus verrucosusnative Warty dory  
Perciformes Scombridae Allothunnus fallainative Slender tuna  
Lamniformes Alopiidae Alopias vulpinusnative Thresher  
Tetraodontiformes Monacanthidae Aluterus monocerosnative Unicorn leatherjacket filefish  
Rajiformes Rajidae Amblyraja doellojuradoinative Southern thorny skate  
Rajiformes Rajidae Amblyraja frerichsinative Thickbody skate  
Rajiformes Rajidae Amblyraja georgiananative Antarctic starry skate  
Siluriformes Doradidae Anadoras insculptusnative  armado 
Siluriformes Doradidae Anadoras weddelliinative  Armado 
Syngnathiformes Syngnathidae Anarchopterus tectusnative Insular pipefish  
Clupeiformes Engraulidae Anchoa hepsetusnative Broad-striped anchovy  
Clupeiformes Engraulidae Anchoa mariniinative Marini's anchovy  
Clupeiformes Engraulidae Anchoa tricolornative Piquitinga anchovy  
Siluriformes Loricariidae Ancistrus cirrhosusnative Jumbie teta cascudo 
Siluriformes Loricariidae Ancistrus hoplogenysnative  vieja 
Siluriformes Loricariidae Ancistrus piriformisnative   
Siluriformes Loricariidae Ancistrus taunayinative   
Beryciformes Anoplogastridae Anoplogaster cornutanative Common fangtooth  
Perciformes Caproidae Antigonia caprosnative Deepbody boarfish  
Gadiformes Moridae Antimora rostratanative Blue antimora  
Characiformes Parodontidae Apareiodon affinisnative Darter characine Canivete 
Characiformes Parodontidae Apareiodon piracicabaenative   
Perciformes Trichiuridae Aphanopus mikhailininative Mikhailin's scabbardfish  
Characiformes Characidae Aphyocharax alburnusnative Goldencrown tetra Mojarrita 
Characiformes Characidae Aphyocharax anisitsinative Bloodfin tetra Mojarrita 
Characiformes Characidae Aphyocharax dentatusnative  Mojarrita 
Characiformes Characidae Aphyocharax nattererinative   
Characiformes Characidae Aphyocharax rathbuninative Redflank bloodfin  
Perciformes Cichlidae Apistogramma borelliinative Umbrella cichlid  
Perciformes Cichlidae Apistogramma commbraenative Corumba cichlid  
Perciformes Cichlidae Apistogramma trifasciatanative   
Osmeriformes Galaxiidae Aplochiton taeniatusnative  peladilla 
Osmeriformes Galaxiidae Aplochiton zebranative  peladilla 
Gymnotiformes Apteronotidae Apteronotus albifronsnative Black ghost cheroga 
Gymnotiformes Apteronotidae Apteronotus brasiliensisnative  boca rachada 
Gymnotiformes Apteronotidae Apteronotus ellisiendemic   
Aulopiformes Paralepididae Arctozenus rissonative Spotted barracudina  
Perciformes Zoarcidae Argentinolycus elongatusnative   
Stomiiformes Sternoptychidae Argyropelecus aculeatusnative Lovely hatchetfish  
Stomiiformes Sternoptychidae Argyropelecus gigasnative Hatchetfish  
Stomiiformes Sternoptychidae Argyropelecus hemigymnusnative Half-naked hatchetfish  
Stomiiformes Stomiidae Aristostomias polydactylusnative   
Tetraodontiformes Tetraodontidae Arothron firmamentumnative Starry toado  
Perciformes Cichlidae Astronotus crassipinnisnative   
Perciformes Cichlidae Astronotus ocellatusnative Oscar acará 
Perciformes Uranoscopidae Astroscopus sexspinosusnative Brazilian stargazer Cura 
Characiformes Characidae Astyanax abramisnative  Acará-pixuma 
Characiformes Characidae Astyanax aramburuinative   
Characiformes Characidae Astyanax asuncionensisnative   
Characiformes Characidae Astyanax bimaculatusnative Twospot astyanax Canivete 
Characiformes Characidae Astyanax chiconative   
Characiformes Characidae Astyanax cordovaenative  Mojarra 
Characiformes Characidae Astyanax correntinusnative  Mojarra 
Characiformes Characidae Astyanax eigenmanniorumnative  Chato 
Characiformes Characidae Astyanax endynative   
Characiformes Characidae Astyanax erythropterusnative  Mojarra 
Characiformes Characidae Astyanax fasciatusnative Banded astyanax Lambari 
Characiformes Characidae Astyanax gymnogenysnative  Mojarra 
Characiformes Characidae Astyanax hermosusnative   
Characiformes Characidae Astyanax itaendemic  Mojarra 
Characiformes Characidae Astyanax jacuhiensisnative   
Characiformes Characidae Astyanax latensnative   
Characiformes Characidae Astyanax leonidasendemic  Mojarra 
Characiformes Characidae Astyanax lineatusnative  Lambari 
Characiformes Characidae Astyanax ojiaraendemic   
Characiformes Characidae Astyanax orbignyanusnative   
Characiformes Characidae Astyanax pampanative   
Characiformes Characidae Astyanax paranahybaenative  Mojarra 
Characiformes Characidae Astyanax parisendemic  Mojarra 
Characiformes Characidae Astyanax pellegrininative  Mojarra 
Characiformes Characidae Astyanax pukanative   
Characiformes Characidae Astyanax pynandinative   
Characiformes Characidae Astyanax saguazuendemic   
Characiformes Characidae Astyanax scabripinnisnative  Mojarra 
Characiformes Characidae Astyanax stenohalinusnative   
Characiformes Characidae Astyanax taeniatusnative   
Characiformes Characidae Astyanax troyaendemic  Mojarra 
Characiformes Characidae Astyanax tumbayaensisnative   
Characiformes Characidae Astyanax tupiendemic   
Rajiformes Arhynchobatidae Atlantoraja castelnauinative Spotback skate  
Rajiformes Arhynchobatidae Atlantoraja cyclophoranative Eyespot skate  
Rajiformes Arhynchobatidae Atlantoraja platananative La Plata skate  
Siluriformes Auchenipteridae Auchenipterus nigripinnisnative  bagre 
Siluriformes Auchenipteridae Auchenipterus nuchalisnative   
Siluriformes Auchenipteridae Auchenipterus osteomystaxnative  Hocicón 
Beryciformes Trachichthyidae Aulotrachichthys atlanticusnative Brazilian luminous roughy  
Perciformes Cichlidae Australoheros angirunative   
Perciformes Cichlidae Australoheros facetusnative Chameleon cichlid Peine 
Perciformes Cichlidae Australoheros forquilhanative   
Perciformes Cichlidae Australoheros kaayguanative   
Perciformes Cichlidae Australoheros scitulusnative   
Perciformes Cichlidae Australoheros tembeendemic  chanchita 
Perciformes Cichlidae Australoheros ykereguanative   
Cyprinodontiformes Rivulidae Austrolebias alexandrinative   
Cyprinodontiformes Rivulidae Austrolebias bellottiinative Argentine pearlfish Pavito 
Cyprinodontiformes Rivulidae Austrolebias elongatusendemic   
Cyprinodontiformes Rivulidae Austrolebias monstrosusnative   
Cyprinodontiformes Rivulidae Austrolebias nigripinnisnative Blackfin pearlfish  
Cyprinodontiformes Rivulidae Austrolebias nonoiuliensisnative   
Cyprinodontiformes Rivulidae Austrolebias robustusnative   
Cyprinodontiformes Rivulidae Austrolebias tobanative   
Cyprinodontiformes Rivulidae Austrolebias vandenberginative   
Perciformes Zoarcidae Austrolycus depressicepsnative   
Perciformes Zoarcidae Austrolycus laticinctusnative   
Perciformes Scombridae Auxis rocheinative Bullet tuna  
Perciformes Scombridae Auxis thazardnative Frigate tuna  
Siluriformes Bagridae Bagrus tucumanusnative   
Tetraodontiformes Balistidae Balistes capriscusnative Grey triggerfish  
Atheriniformes Atherinopsidae Basilichthys microlepidotusnative   
Anguilliformes Congridae Bassanago albescensnative Hairy conger Congrio 
Stomiiformes Stomiidae Bathophilus aternative Winged dragonfish  
Stomiiformes Stomiidae Bathophilus nigerrimusnative Scaleless dragonfish  
Osmeriformes Bathylagidae Bathylagus antarcticusnative Antarctic deepsea smelt  
Rajiformes Arhynchobatidae Bathyraja albomaculatanative White-dotted skate Raya de lunares 
Rajiformes Arhynchobatidae Bathyraja brachyuropsnative Broadnose skate Raya de los canales 
Rajiformes Arhynchobatidae Bathyraja cousseauaenative Joined-fins skate Raya Aletas Juntas 
Rajiformes Arhynchobatidae Bathyraja griseocaudanative Graytail skate  
Rajiformes Arhynchobatidae Bathyraja macloviananative Patagonian skate  
Rajiformes Arhynchobatidae Bathyraja magellanicanative Magellan skate  
Rajiformes Arhynchobatidae Bathyraja meridionalisnative Dark-belly skate  
Rajiformes Arhynchobatidae Bathyraja multispinisnative Multispine skate  
Rajiformes Arhynchobatidae Bathyraja papilioniferanative   
Rajiformes Arhynchobatidae Bathyraja scaphiopsnative Cuphead skate  
Rajiformes Arhynchobatidae Bathyraja schroederinative Whitemouth skate  
Myliobatiformes Dasyatidae Bathytoshia centrouranative Roughtail stingray  
Perciformes Trichiuridae Benthodesmus elongatusnative Elongate frostfish  
Siluriformes Pimelodidae Bergiaria platanaendemic   
Siluriformes Pimelodidae Bergiaria westermanninative  bagre 
Beryciformes Berycidae Beryx decadactylusnative Alfonsino  
Myctophiformes Myctophidae Bolinichthys indicusnative Lanternfish  
Myctophiformes Myctophidae Bolinichthys photothoraxnative Spurcheek lanternfish  
Myctophiformes Myctophidae Bolinichthys supralateralisnative Stubby lanternfish  
Perciformes Haemulidae Boridia grossidensnative Borriqueta porgy  
Perciformes Bovichtidae Bovichtus argentinusnative   
Gymnotiformes Hypopomidae Brachyhypopomus brevirostrisnative Bluntnose knifefish  
Perciformes Bramidae Brama bramanative Atlantic pomfret  
Clupeiformes Clupeidae Brevoortia aureanative Brazilian menhaden Lacha 
Clupeiformes Clupeidae Brevoortia pectinatanative Argentine menhaden Lacha 
Siluriformes Loricariidae Brochiloricaria chauliodonnative   
Characiformes Bryconidae Brycon orbignyanusnative  Pirá-pitá 
Characiformes Characidae Bryconamericus agnaendemic   
Characiformes Characidae Bryconamericus eigenmanninative   
Characiformes Characidae Bryconamericus exodonnative  Mojarra 
Characiformes Characidae Bryconamericus iheringiinative  Lambari 
Characiformes Characidae Bryconamericus ikaaendemic   
Characiformes Characidae Bryconamericus menniiendemic   
Characiformes Characidae Bryconamericus pyahuendemic   
Characiformes Characidae Bryconamericus rubropictusnative   
Characiformes Characidae Bryconamericus stramineusnative  Lambari 
Characiformes Characidae Bryconamericus sylvicolaendemic   
Characiformes Characidae Bryconamericus thomasinative   
Characiformes Characidae Bryconamericus uporasnative   
Characiformes Characidae Bryconamericus ytuendemic   
Perciformes Cichlidae Bujurquina vittatanative Banded acara acará 
Siluriformes Aspredinidae Bunocephalus doriaenative  guitarrita 
Siluriformes Callichthyidae Callichthys callichthysnative Cascarudo amarillito 
Perciformes Labrisomidae Calliclinus geniguttatusnative   
Chimaeriformes Callorhinchidae Callorhinchus callorynchusnative Plownose chimaera Músico 
Tetraodontiformes Balistidae Canthidermis maculatanative Rough triggerfish  
Perciformes Carangidae Caranx crysosnative Blue runner  
Cypriniformes Cyprinidae Carassius auratusintroduced Goldfish Pez chino 
Carcharhiniformes Carcharhinidae Carcharhinus brachyurusnative Copper shark  
Carcharhiniformes Carcharhinidae Carcharhinus brevipinnanative Spinner shark  
Carcharhiniformes Carcharhinidae Carcharhinus leucasnative Bull shark  
Carcharhiniformes Carcharhinidae Carcharhinus longimanusnative Oceanic whitetip shark  
Carcharhiniformes Carcharhinidae Carcharhinus plumbeusnative Sandbar shark  
Carcharhiniformes Carcharhinidae Carcharhinus signatusnative Night shark  
Lamniformes Odontaspididae Carcharias taurusnative Sand tiger shark  
Lamniformes Lamnidae Carcharodon carchariasnative Great white shark  
Scorpaeniformes Liparidae Careproctus acaecusnative Appendageless snailfish  
Scorpaeniformes Liparidae Careproctus aculeolatusnative Small-spine snailfish  
Scorpaeniformes Liparidae Careproctus cactiformisnative   
Scorpaeniformes Liparidae Careproctus macranchusnative   
Scorpaeniformes Liparidae Careproctus pallidusnative   
Perciformes Caristiidae Caristius fasciatusnative Greenland manefish  
Perciformes Caristiidae Caristius meridionalisnative   
Ophidiiformes Bythitidae Cataetyx messierinative   
Pleuronectiformes Achiridae Catathyridium garmaninative  Lenguado 
Pleuronectiformes Achiridae Catathyridium jenynsiinative  lenguado 
Pleuronectiformes Achiridae Catathyridium lorentziinative  Lenguado 
Siluriformes Ariidae Cathorops puncticulatusnative   
Syngnathiformes Centriscidae Centriscops humerosusnative Banded yellowfish  
Myctophiformes Myctophidae Centrobranchus nigroocellatusnative Roundnose lanternfish  
Perciformes Centrolophidae Centrolophus nigernative Rudderfish  
Squaliformes Etmopteridae Centroscyllium fabriciinative Black dogfish  
Squaliformes Etmopteridae Centroscyllium granulatumnative Granular dogfish  
Squaliformes Somniosidae Centroscymnus macracanthusnative Largespine velvet dogfish  
Myctophiformes Myctophidae Ceratoscopelus warmingiinative Warming's lantern fish  
Siluriformes Cetopsidae Cetopsis gobioidesnative  bagre 
Siluriformes Cetopsidae Cetopsis starnesinative   
Lamniformes Cetorhinidae Cetorhinus maximusnative Basking shark  
Perciformes Cichlidae Chaetobranchopsis australisnative   
Perciformes Channichthyidae Champsocephalus esoxnative Pike icefish Tsataki 
Characiformes Crenuchidae Characidium borelliinative   
Characiformes Crenuchidae Characidium occidentalenative  Mojarrita 
Characiformes Crenuchidae Characidium pterostictumnative   
Characiformes Crenuchidae Characidium rachoviinative  Mojarrita 
Characiformes Crenuchidae Characidium tenuenative  Tritolo 
Characiformes Characidae Charax leticiaenative  Dentudo 
Characiformes Characidae Charax stenopterusnative  Dentudo transparente 
Stomiiformes Stomiidae Chauliodus minimusnative   
Characiformes Characidae Cheirodon ibicuhiensisnative  Mojarrita 
Characiformes Characidae Cheirodon interruptusnative Uruguay tetra Mojarrita 
Perciformes Chiasmodontidae Chiasmodon nigernative Black swallower  
Tetraodontiformes Diodontidae Chilomycterus spinosus spinosusnative   
Perciformes Carangidae Chloroscombrus chrysurusnative Atlantic bumper  
Perciformes Cichlidae Cichlasoma dimerusnative   
Siluriformes Clariidae Clarias gariepinusintroduced North African catfish  
Characiformes Triportheidae Clupeacharax anchoveoidesnative   
Cyprinodontiformes Poeciliidae Cnesterodon decemmaculatusnative Ten spotted live-bearer madrecita 
Cyprinodontiformes Poeciliidae Cnesterodon pirainative   
Cyprinodontiformes Poeciliidae Cnesterodon raddainative   
Gadiformes Macrouridae Coelorinchus aconcaguanative Aconcagua grenadier  
Gadiformes Macrouridae Coelorinchus fasciatusnative Banded whiptail Granadero 
Gadiformes Macrouridae Coelorinchus kaiyomarunative Campbell whiptail  
Gadiformes Macrouridae Coelorinchus mariniinative Marini's grenadier  
Anguilliformes Congridae Conger orbignianusnative Argentine conger Congrio 
Scorpaeniformes Congiopodidae Congiopodus peruvianusnative Horsefish Pez chancho 
Perciformes Haemulidae Conodon nobilisnative Barred grunt  
Perciformes Priacanthidae Cookeolus japonicusnative Longfinned bullseye  
Salmoniformes Salmonidae Coregonus clupeaformisintroduced Lake whitefish  
Perciformes Labridae Coris julisnative Mediterranean rainbow wrasse  
Siluriformes Callichthyidae Corydoras aeneusnative Bronze corydoras pirá-itá 
Siluriformes Callichthyidae Corydoras aurofrenatusnative   
Siluriformes Callichthyidae Corydoras carlaenative  pirá-itá 
Siluriformes Callichthyidae Corydoras ellisaenative  pirá-itá 
Siluriformes Callichthyidae Corydoras gladysaenative   
Siluriformes Callichthyidae Corydoras hastatusnative Dwarf corydoras amarillito 
Siluriformes Callichthyidae Corydoras longipinnisnative   
Siluriformes Callichthyidae Corydoras micracanthusnative  tachuela 
Siluriformes Callichthyidae Corydoras microcephalusnative   
Siluriformes Callichthyidae Corydoras paleatusnative Peppered corydoras amarillito 
Siluriformes Callichthyidae Corydoras petraciniinative   
Siluriformes Callichthyidae Corydoras polystictusnative   
Siluriformes Callichthyidae Corydoras undulatusnative   
Gadiformes Macrouridae Coryphaenoides filicaudanative Grenadier  
Gadiformes Macrouridae Coryphaenoides subserrulatusnative Longrayed whiptail  
Perciformes Bovichtidae Cottoperca gobionative Channel bull blenny Yakouroum 
Perciformes Bovichtidae Cottoperca trigloidesnative   
Scorpaeniformes Psychrolutidae Cottunculus granulosusnative Fathead  
Characiformes Characidae Creagrutus beninative Goldstripe characin  
Perciformes Cichlidae Crenicichla celidochilusnative   
Perciformes Cichlidae Crenicichla gauchonative   
Perciformes Cichlidae Crenicichla hadrostigmanative   
Perciformes Cichlidae Crenicichla hunative   
Perciformes Cichlidae Crenicichla iguassuensisnative   
Perciformes Cichlidae Crenicichla jupiaensisnative   
Perciformes Cichlidae Crenicichla lacustrisnative  boca amarga 
Perciformes Cichlidae Crenicichla lepidotanative Pike cichlid boca amarga 
Perciformes Cichlidae Crenicichla mandelburgerinative   
Perciformes Cichlidae Crenicichla minuanonative   
Perciformes Cichlidae Crenicichla missioneiranative   
Perciformes Cichlidae Crenicichla niederleiniinative  juanita 
Perciformes Cichlidae Crenicichla scottiinative   
Perciformes Cichlidae Crenicichla semifasciatanative   
Perciformes Cichlidae Crenicichla taikyranative   
Perciformes Cichlidae Crenicichla tapiinative   
Perciformes Cichlidae Crenicichla tendybaguassunative   
Perciformes Cichlidae Crenicichla tesaynative   
Perciformes Cichlidae Crenicichla tucanative   
Perciformes Cichlidae Crenicichla vittatanative  boca amarga 
Perciformes Cichlidae Crenicichla yahanative   
Perciformes Cichlidae Crenicichla yponative   
Perciformes Zoarcidae Crossostomus chilensisnative   
Perciformes Zoarcidae Crossostomus fasciatusnative   
Characiformes Characidae Ctenobrycon alleninative   
Characiformes Characidae Ctenobrycon multiradiatusnative   
Cypriniformes Cyprinidae Ctenopharyngodon idellaintroduced Grass carp Sogyo 
Perciformes Nomeidae Cubiceps caeruleusnative Blue fathead  
Characiformes Curimatidae Curimatella dorsalisnative  Blanquillo 
Characiformes Characidae Cyanocharax lepiclastusnative   
Characiformes Characidae Cyanocharax obinative   
Characiformes Characidae Cyanocharax uruguayensisnative   
Characiformes Characidae Cynopotamus argenteusnative  Dientudo jorobado 
Characiformes Characidae Cynopotamus kincaidinative  Dentudo 
Perciformes Sciaenidae Cynoscion acoupanative Acoupa weakfish  
Perciformes Sciaenidae Cynoscion guatucupanative Stripped weakfish  
Perciformes Sciaenidae Cynoscion jamaicensisnative Jamaica weakfish  
Perciformes Sciaenidae Cynoscion striatusnative Striped weakfish Pescadilla 
Characiformes Curimatidae Cyphocharax platanusnative  Curimbatasinho 
Characiformes Curimatidae Cyphocharax saladensisnative Rosy curimata Sabalito 
Characiformes Curimatidae Cyphocharax spilotusnative  Sabalito 
Characiformes Curimatidae Cyphocharax voganative  Curimbatasinho 
Cypriniformes Cyprinidae Cyprinus carpiointroduced Common carp Carpa 
Scorpaeniformes Dactylopteridae Dactylopterus volitansnative Flying gurnard  
Perciformes Zoarcidae Dadyanos insignisnative   
Myliobatiformes Dasyatidae Dasyatis hypostigmanative   
Myliobatiformes Dasyatidae Dasyatis pastinacanative Common stingray  
Perciformes Carangidae Decapterus tablnative Roughear scad  
Myctophiformes Myctophidae Diaphus bertelseninative Bertelsen's lanternfish  
Myctophiformes Myctophidae Diaphus dumeriliinative   
Myctophiformes Myctophidae Diaphus hudsoninative Hudson's lanternfish  
Myctophiformes Myctophidae Diaphus metopoclampusnative Spothead lantern fish  
Myctophiformes Myctophidae Diaphus mollisnative Soft lanternfish  
Myctophiformes Myctophidae Diaphus perspicillatusnative Transparent lantern fish  
Myctophiformes Myctophidae Diaphus subtilisnative   
Characiformes Characidae Diapoma terofalinative   
Anguilliformes Synaphobranchidae Diastobranchus capensisnative Basketwork eel  
Myctophiformes Myctophidae Diogenichthys atlanticusnative Longfin lanternfish  
Perciformes Serranidae Diplectrum radialenative Pond perch Aguavina 
Perciformes Sparidae Diplodus argenteusnative South American silver porgy  
Rajiformes Rajidae Dipturus argentinensisnative Argentine skate Raya hocicuda de cola larga 
Rajiformes Rajidae Dipturus flavirostrisnative   
Rajiformes Rajidae Dipturus trachydermanative Ray  
Torpediniformes Narcinidae Discopyge castelloinative   
Torpediniformes Narcinidae Discopyge tschudiinative Apron ray Raya eléctrica 
Perciformes Nototheniidae Dissostichus eleginoidesnative Patagonian toothfish Merluza negra 
Perciformes Serranidae Dules auriganative  Pez cochero 
Perciformes Echeneidae Echeneis naucratesnative Live sharksucker  
Squaliformes Echinorhinidae Echinorhinus brucusnative Bramble shark  
Ophidiiformes Carapidae Echiodon cryomargaritesnative Messmate  
Stomiiformes Stomiidae Echiostoma barbatumnative Threadfin dragonfish  
Gymnotiformes Sternopygidae Eigenmannia trilineatanative   
Gymnotiformes Sternopygidae Eigenmannia virescensnative Glass knifefish banderita 
Myctophiformes Myctophidae Electrona carlsberginative Electron subantarctic  
Myctophiformes Myctophidae Electrona subasperanative Rough lanternfish  
Perciformes Eleginopsidae Eleginops maclovinusnative Patagonian blennie Róbalo 
Clupeiformes Engraulidae Engraulis anchoitanative Argentine anchovy Anchoíta 
Characiformes Triportheidae Engraulisoma taeniatumnative   
Siluriformes Loricariidae Epactionotus yasiendemic   
Siluriformes Auchenipteridae Epapterus dispilurusnative   
Perciformes Epigonidae Epigonus robustusnative Robust cardinalfish  
Perciformes Serranidae Epinephelus marginatusnative Dusky grouper  
Squaliformes Etmopteridae Etmopterus bigelowinative Blurred smooth lantern shark  
Squaliformes Etmopteridae Etmopterus gracilispinisnative Broadbanded lanternshark  
Squaliformes Etmopteridae Etmopterus granulosusnative Southern lanternshark  
Squaliformes Etmopteridae Etmopterus pusillusnative Smooth lanternshark  
Pleuronectiformes Paralichthyidae Etropus longimanusnative   
Perciformes Gerreidae Eucinostomus gulanative Jenny mojarra  
Squaliformes Dalatiidae Euprotomicroides zantedeschianative Taillight shark  
Stomiiformes Stomiidae Eustomias enbarbatusnative Barbate dragonfish  
Perciformes Scombridae Euthynnus alletteratusnative Little tunny  
Aulopiformes Evermannellidae Evermannella balbonative Balbo sabretooth  
Siluriformes Loricariidae Farlowella amazonumnative   
Siluriformes Loricariidae Farlowella hahninative  vieja 
Syngnathiformes Fistulariidae Fistularia petimbanative Red cornetfish  
Stomiiformes Stomiidae Flagellostomias boureeinative Longbarb dragonfish  
Osmeriformes Galaxiidae Galaxias maculatusnative Inanga puye 
Osmeriformes Galaxiidae Galaxias plateinative  puye 
Carcharhiniformes Carcharhinidae Galeocerdo cuviernative Tiger shark  
Characiformes Characidae Galeocharax humeralisnative  Dientudo 
Characiformes Characidae Galeocharax kneriinative  Dientudo 
Carcharhiniformes Triakidae Galeorhinus galeusnative Tope shark Tiburón vitaminico 
Cyprinodontiformes Poeciliidae Gambusia affinisintroduced Mosquitofish orillero 
Perciformes Scombridae Gasterochisma melampusnative Butterfly kingfish  
Siluriformes Ariidae Genidens barbusnative White sea catfish Bagre 
Siluriformes Ariidae Genidens genidensnative Guri sea catfish  
Siluriformes Ariidae Genidens machadoinative   
Siluriformes Ariidae Genidens planifronsnative   
Ophidiiformes Ophidiidae Genypterus blacodesnative Pink cusk-eel Abadejo 
Ophidiiformes Ophidiidae Genypterus brasiliensisnative   
Petromyzontiformes Geotriidae Geotria australisnative Pouched lamprey  
Siluriformes Auchenipteridae Glanidium albescensnative   
Siluriformes Auchenipteridae Glanidium ribeiroinative  bagre 
Gobiesociformes Gobiesocidae Gobiesox marmoratusnative  Peje-sapo veteado 
Perciformes Gobiidae Gobiosoma hemigymnumnative Half naked goby  
Gadiformes Moridae Guttigadus konginative Austral cod  
Characiformes Characidae Gymnocharacinus bergiiendemic Naked characin Mojarra bronceada 
Characiformes Characidae Gymnocorymbus ternetzinative Black tetra Monjita 
Perciformes Cichlidae Gymnogeophagus australisnative Uruguayan eartheater acará 
Perciformes Cichlidae Gymnogeophagus balzaniinative Argentine humphead  
Perciformes Cichlidae Gymnogeophagus cheendemic   
Perciformes Cichlidae Gymnogeophagus meridionalisnative   
Myctophiformes Myctophidae Gymnoscopelus bolininative Grand lanternfish  
Myctophiformes Myctophidae Gymnoscopelus nicholsinative Nichol's lanternfish  
Myctophiformes Myctophidae Gymnoscopelus piabilisnative Southern blacktip lanternfish  
Anguilliformes Muraenidae Gymnothorax conspersusnative Saddled moray  
Gymnotiformes Gymnotidae Gymnotus caraponative Banded knifefish  
Gymnotiformes Gymnotidae Gymnotus inaequilabiatusnative   
Myliobatiformes Gymnuridae Gymnura altavelanative Spiny butterfly ray  
Gadiformes Moridae Halargyreus johnsoniinative Slender codling  
Clupeiformes Clupeidae Harengula jaguananative Scaled herring  
Perciformes Harpagiferidae Harpagifer bispinisnative Magellan plunderfish  
Siluriformes Trichomycteridae Hatcheria macraeinative   
Perciformes Tripterygiidae Helcogrammoides cunninghaminative Cunningham's triplefin  
Scorpaeniformes Sebastidae Helicolenus lahilleinative  Rubio 
Scorpaeniformes Sebastidae Helicolenus lengerichinative   
Siluriformes Loricariidae Hemiancistrus fuliginosusnative   
Perciformes Carangidae Hemicaranx amblyrhynchusnative Bluntnose jack  
Characiformes Characidae Hemigrammus mahnertinative   
Characiformes Characidae Hemigrammus mateinative   
Characiformes Characidae Hemigrammus ulreyinative   
Characiformes Hemiodontidae Hemiodus orthonopsnative  Sardina de rio 
Siluriformes Pimelodidae Hemisorubim platyrhynchosnative Porthole shovelnose catfish gerupoca 
Siluriformes Heptapteridae Heptapterus mbyanative   
Siluriformes Heptapteridae Heptapterus mustelinusnative  Bagre 
Siluriformes Heptapteridae Heptapterus qenqonative   
Hexanchiformes Hexanchidae Heptranchias perlonative Sharpnose sevengill shark  
Characiformes Characidae Heterocheirodon yatainative  Mojarrita 
Perciformes Priacanthidae Heteropriacanthus cruentatusnative Glasseye  
Hexanchiformes Hexanchidae Hexanchus griseusnative Bluntnose sixgill shark  
Lophiiformes Himantolophidae Himantolophus appeliinative Prickly footballfish  
Syngnathiformes Syngnathidae Hippocampus patagonicusnative   
Siluriformes Loricariidae Hisonotus akyendemic   
Siluriformes Loricariidae Hisonotus charruanative   
Siluriformes Loricariidae Hisonotus hungynative   
Siluriformes Loricariidae Hisonotus maculipinnisnative   
Siluriformes Loricariidae Hisonotus paulinusnative   
Siluriformes Trichomycteridae Homodiaetus anisitsinative   
Characiformes Erythrinidae Hoplerythrinus unitaeniatusnative Aimara jejú 
Characiformes Erythrinidae Hoplias australisnative   
Characiformes Erythrinidae Hoplias malabaricusnative Trahira Taraira 
Characiformes Erythrinidae Hoplias mbiguaendemic   
Siluriformes Callichthyidae Hoplosternum littoralenative Atipa  
Anguilliformes Nettastomatidae Hoplunnis tenuisnative Spotted pike-conger  
Gadiformes Macrouridae Hymenocephalus billsamnative   
Myliobatiformes Dasyatidae Hypanus saynative Bluntnose stingray  
Perciformes Centrolophidae Hyperoglyphe antarcticanative Bluenose warehou  
Characiformes Characidae Hyphessobrycon anisitsinative Buenos Aires tetra Mojarra 
Characiformes Characidae Hyphessobrycon aucanative   
Characiformes Characidae Hyphessobrycon bifasciatusnative Yellow tetra  
Characiformes Characidae Hyphessobrycon elachysnative  Mojarra 
Characiformes Characidae Hyphessobrycon equesnative Jewel tetra  
Characiformes Characidae Hyphessobrycon guaraninative  Mojarra 
Characiformes Characidae Hyphessobrycon igneusnative   
Characiformes Characidae Hyphessobrycon isirinative   
Characiformes Characidae Hyphessobrycon luetkeniinative   
Characiformes Characidae Hyphessobrycon meridionalisnative   
Characiformes Characidae Hyphessobrycon nicolasinative   
Characiformes Characidae Hyphessobrycon reticulatusnative   
Characiformes Characidae Hyphessobrycon togoinative   
Characiformes Characidae Hyphessobrycon wajatnative   
Perciformes Blenniidae Hypleurochilus fissicornisnative   
Characiformes Characidae Hypobrycon poiendemic   
Cypriniformes Cyprinidae Hypophthalmichthys molitrixintroduced Silver carp Carpa plateada 
Siluriformes Pimelodidae Hypophthalmus edentatusnative Highwaterman catfish bagre rosado 
Siluriformes Pimelodidae Hypophthalmus oremaculatusnative  bagre rosado 
Gymnotiformes Hypopomidae Hypopomus artedinative  morenita 
Siluriformes Loricariidae Hypoptopoma inexspectatumnative   
Beloniformes Hemiramphidae Hyporhamphus unifasciatusnative Common halfbeak  
Siluriformes Loricariidae Hypostomus alatusnative  acarí 
Siluriformes Loricariidae Hypostomus albopunctatusnative  cascudo 
Siluriformes Loricariidae Hypostomus arecutanative   
Siluriformes Loricariidae Hypostomus auroguttatusnative   
Siluriformes Loricariidae Hypostomus borelliinative  vieja 
Siluriformes Loricariidae Hypostomus boulengerinative   
Siluriformes Loricariidae Hypostomus cochliodonnative  cascudo 
Siluriformes Loricariidae Hypostomus commersoninative  Vieja negra 
Siluriformes Loricariidae Hypostomus commersonoidesnative   
Siluriformes Loricariidae Hypostomus derbyinative  Vieja de agua 
Siluriformes Loricariidae Hypostomus itacuanative   
Siluriformes Loricariidae Hypostomus laplataenative  vieja 
Siluriformes Loricariidae Hypostomus luteomaculatusnative  Vieja de agua 
Siluriformes Loricariidae Hypostomus microstomusnative  Vieja de agua 
Siluriformes Loricariidae Hypostomus myersinative  Vieja de agua 
Siluriformes Loricariidae Hypostomus paranensisnative  Vieja de agua 
Siluriformes Loricariidae Hypostomus paulinusnative  cascudo 
Siluriformes Loricariidae Hypostomus piratatunative   
Siluriformes Loricariidae Hypostomus reganinative  cascudo 
Siluriformes Loricariidae Hypostomus roseopunctatusnative   
Siluriformes Loricariidae Hypostomus ternetzinative   
Siluriformes Loricariidae Hypostomus uruguayensisnative  vieja 
Siluriformes Loricariidae Hypostomus variostictusnative  cascudo 
Perciformes Centrolophidae Icichthys australisnative Southern driftfish  
Stomiiformes Stomiidae Idiacanthus atlanticusnative Black dragonfish  
Stomiiformes Stomiidae Idiacanthus fasciolanative Ribbon sawtail fish  
Siluriformes Pimelodidae Iheringichthys labrosusnative  bagre trompudo 
Perciformes Zoarcidae Iluocoetes fimbriatusnative  Barbada 
Siluriformes Heptapteridae Imparfinis hollandinative  bagre anguila 
Siluriformes Heptapteridae Imparfinis mishkynative   
Perciformes Istiophoridae Istiophorus albicansnative Atlantic sailfish  
Lamniformes Lamnidae Isurus oxyrinchusnative Shortfin mako  
Siluriformes Trichomycteridae Ituglanis eichorniarumnative   
Siluriformes Loricariidae Ixinandria steinbachinative  Vieja 
Cyprinodontiformes Anablepidae Jenynsia alternimaculatanative   
Cyprinodontiformes Anablepidae Jenynsia lineatanative Onesided livebearer  
Cyprinodontiformes Anablepidae Jenynsia luxatanative   
Cyprinodontiformes Anablepidae Jenynsia maculatanative   
Cyprinodontiformes Anablepidae Jenynsia multidentatanative Rio de la Plata onesided livebearer madrecita 
Cyprinodontiformes Anablepidae Jenynsia obscuranative  orillero 
Cyprinodontiformes Anablepidae Jenynsia tucumananative   
Perciformes Istiophoridae Kajikia albidanative Atlantic white marlin  
Perciformes Scombridae Katsuwonus pelamisnative Skipjack tuna  
Perciformes Kyphosidae Kyphosus incisornative Yellow sea chub  
Perciformes Cichlidae Laetacara dorsigeranative Redbreast acara  
Tetraodontiformes Tetraodontidae Lagocephalus laevigatusnative Smooth puffer  
Lamniformes Lamnidae Lamna nasusnative Porbeagle  
Myctophiformes Myctophidae Lampadena luminosanative Luminous lanternfish  
Myctophiformes Myctophidae Lampadena notialisnative Notal lanternfish  
Myctophiformes Myctophidae Lampanyctus australisnative Southern lanternfish  
Myctophiformes Myctophidae Lampanyctus pusillusnative Pygmy lanternfish  
Myctophiformes Myctophidae Lampichthys procerusnative Blackhead lanternfish  
Lampriformes Lampridae Lampris guttatusnative Opah  
Lampriformes Lampridae Lampris immaculatusnative Southern opah  
Gadiformes Moridae Lepidion ensiferusnative Patagonian codling  
Myctophiformes Myctophidae Lepidophanes guentherinative Günther’s lanternfish  
Lepidosireniformes Lepidosirenidae Lepidosiren paradoxanative South American lungfish Lepidosirena 
Characiformes Anostomidae Leporellus pictusnative  Boga 
Characiformes Anostomidae Leporinus acutidensnative  Araçau 
Characiformes Anostomidae Leporinus elongatusnative  Boga 
Characiformes Anostomidae Leporinus fridericinative Threespot leporinus  
Characiformes Anostomidae Leporinus lacustrisnative   
Characiformes Anostomidae Leporinus macrocephalusnative   
Characiformes Anostomidae Leporinus obtusidensnative  Boga 
Characiformes Anostomidae Leporinus octofasciatusnative  Araçau pinima 
Characiformes Anostomidae Leporinus platycephalusnative   
Characiformes Anostomidae Leporinus striatusnative  Boga estriada 
Siluriformes Callichthyidae Lepthoplosternum pectoralenative  cascarudo 
Syngnathiformes Syngnathidae Leptonotus blainvilleanusnative Deep-bodied pipefish  
Stomiiformes Stomiidae Leptostomias gladiatornative   
Perciformes Zoarcidae Letholycus magellanicusnative   
Perciformes Zoarcidae Letholycus microphthalmusnative   
Myctophiformes Myctophidae Lobianchia dofleininative Dofleini's lantern fish  
Myctophiformes Myctophidae Lobianchia gemellariinative Cocco's lantern fish  
Perciformes Lobotidae Lobotes surinamensisnative Tripletail  
Lophiiformes Lophiidae Lophius gastrophysusnative Blackfin goosefish  
Perciformes Malacanthidae Lopholatilus villariinative Tile fish  
Siluriformes Loricariidae Loricaria apeltogasternative   
Siluriformes Loricariidae Loricaria holmberginative   
Siluriformes Loricariidae Loricaria luciaenative   
Siluriformes Loricariidae Loricaria simillimanative   
Siluriformes Loricariidae Loricaria tucumanensisnative  guitaarra 
Siluriformes Loricariidae Loricariichthys anusnative   
Siluriformes Loricariidae Loricariichthys edentatusnative   
Siluriformes Loricariidae Loricariichthys labialisnative  Maimingué 
Siluriformes Loricariidae Loricariichthys melanocheilusnative   
Siluriformes Loricariidae Loricariichthys platymetoponnative   
Siluriformes Loricariidae Loricariichthys rostratusnative   
Siluriformes Pimelodidae Luciopimelodus patinative Pati morre-morre 
Aulopiformes Notosudidae Luciosudis normaninative Paperbones  
Perciformes Zoarcidae Lycenchelys bachmanninative   
Clupeiformes Engraulidae Lycengraulis grossidensnative Atlantic sabretooth anchovy Anchoa 
Perciformes Zoarcidae Lycodapus australisnative   
Perciformes Zoarcidae Lycodonus malvinensisnative   
Perciformes Sciaenidae Macrodon ancylodonnative King weakfish  
Perciformes Sciaenidae Macrodon atricaudanative Southern King Weakfish  
Aulopiformes Paralepididae Macroparalepis affinisnative   
Aulopiformes Paralepididae Macroparalepis macrogeneionnative Longfin barracudina  
Characiformes Characidae Macropsobrycon uruguayanaenative  Mojarrita 
Syngnathiformes Centriscidae Macroramphosus scolopaxnative Longspine snipefish  
Siluriformes Loricariidae Macrotocinclus affinisnative Golden otocinclus  
Gadiformes Macrouridae Macrourus carinatusnative Ridge scaled rattail  
Gadiformes Macrouridae Macrourus holotrachysnative Bigeye grenadier Granadero grande 
Gadiformes Macrouridae Macrourus whitsoninative Whitson's grenadier  
Gadiformes Merlucciidae Macruronus magellanicusnative Patagonian grenadier Argentino 
Aulopiformes Paralepididae Magnisudis prionosanative Southern barracudina  
Perciformes Istiophoridae Makaira nigricansnative Blue marlin  
Gadiformes Macrouridae Malacocephalus occidentalisnative Western softhead grenadier  
Pleuronectiformes Achiropsettidae Mancopsetta maculatanative Antarctic armless flounder  
Characiformes Characidae Markiana nigripinnisnative  Ipau 
Stomiiformes Sternoptychidae Maurolicus muellerinative Silvery lightfish Yoalaakaci 
Stomiiformes Sternoptychidae Maurolicus stehmanninative   
Perciformes Zoarcidae Maynea punctanative   
Siluriformes Loricariidae Megalancistrus parananusnative  cascudo 
Siluriformes Callichthyidae Megalechis thoracatanative   
Siluriformes Pimelodidae Megalonema argentinumendemic  patí de aletas negras 
Siluriformes Pimelodidae Megalonema platanumnative  bagre blanco 
Lophiiformes Melanocetidae Melanocetus johnsoniinative Humpback anglerfish  
Gadiformes Melanonidae Melanonus gracilisnative Pelagic cod  
Cyprinodontiformes Rivulidae Melanorivulus punctatusnative   
Perciformes Zoarcidae Melanostigma gelatinosumnative Limp eelpout  
Stomiiformes Stomiidae Melanostomias bartonbeaninative Scaleless black dragonfish  
Perciformes Sciaenidae Menticirrhus americanusnative Southern kingcroaker  
Gadiformes Merlucciidae Merluccius australisnative Southern hake Merluzón 
Gadiformes Merlucciidae Merluccius hubbsinative Argentine hake Merluza común 
Gadiformes Merlucciidae Merluccius patagonicusnative Patagonian hake  
Gadiformes Merlucciidae Merluccius tasmanicusnative   
Myctophiformes Myctophidae Metelectrona ventralisnative Flaccid lanternfish  
Characiformes Serrasalmidae Metynnis maculatusnative Spotted metynnis  
Characiformes Serrasalmidae Metynnis molanative  pacú 
Siluriformes Pseudopimelodidae Microglanis parahybaenative   
Syngnathiformes Syngnathidae Micrognathus crinitusnative Banded pipefish  
Gadiformes Gadidae Micromesistius australisnative Southern blue whiting Polaca 
Perciformes Sciaenidae Micropogonias furnierinative Whitemouth croaker Corvina 
Perciformes Sciaenidae Micropogonias undulatusnative Atlantic croaker  
Perciformes Centrarchidae Micropterus salmoidesintroduced Largemouth black bass  
Osmeriformes Alepocephalidae Mirognathus normaninative Norman's smooth-head  
Myliobatiformes Myliobatidae Mobula hypostomanative Lesser devil ray  
Characiformes Characidae Moenkhausia dichrouranative Bandtail tetra Mojarra 
Characiformes Characidae Moenkhausia intermedianative  Mojarra 
Characiformes Characidae Moenkhausia sanctaefilomenaenative Redeye tetra Mojarra 
Tetraodontiformes Molidae Mola molanative Ocean sunfish  
Tetraodontiformes Monacanthidae Monacanthus ciliatusnative Fringed filefish  
Ophidiiformes Ophidiidae Monomitopus americanusnative   
Perciformes Moronidae Morone saxatilisintroduced Striped bass  
Mugiliformes Mugilidae Mugil curemanative White mullet  
Mugiliformes Mugilidae Mugil lizanative Lebranche mullet lisa 
Perciformes Mullidae Mullus argentinaenative Argentine goatfish Barbillo 
Gadiformes Muraenolepididae Muraenolepis orangiensisnative Patagonian moray cod Yakouchlif 
Carcharhiniformes Triakidae Mustelus canisnative Dusky smooth-hound  
Carcharhiniformes Triakidae Mustelus fasciatusnative Striped smooth-hound  
Carcharhiniformes Triakidae Mustelus schmittinative Narrownose smooth-hound  
Myctophiformes Myctophidae Myctophum affinenative Metallic lantern fish  
Myctophiformes Myctophidae Myctophum obtusirostrenative Bluntsnout lanternfish  
Myliobatiformes Myliobatidae Myliobatis freminvilleinative Bullnose eagle ray  
Myliobatiformes Myliobatidae Myliobatis goodeinative Southern eagle ray  
Myliobatiformes Myliobatidae Myliobatis ridensnative Shortnose eagle ray Chucho ñato 
Characiformes Serrasalmidae Myloplus tietenative  pacucita 
Characiformes Serrasalmidae Mylossoma duriventrenative  brillantina 
Myxiniformes Myxinidae Myxine affinisnative Patagonian hagfish  
Myxiniformes Myxinidae Myxine australisnative   
Myxiniformes Myxinidae Myxine debueninative   
Myxiniformes Myxinidae Myxine fernholminative   
Myctophiformes Myctophidae Nannobrachium atrumnative Dusky lanternfish  
Osmeriformes Microstomatidae Nansenia antarcticanative   
Characiformes Characidae Nantis indefessusnative   
Torpediniformes Narcinidae Narcine brasiliensisnative Brazilian electric ray  
Perciformes Carangidae Naucrates ductornative Pilotfish  
Perciformes Cheilodactylidae Nemadactylus berginative Castaneta Besugo blanco 
Perciformes Cheilodactylidae Nemadactylus macropterusnative Tarakihi  
Myxiniformes Myxinidae Nemamyxine krefftinative   
Anguilliformes Nemichthyidae Nemichthys curvirostrisnative Boxer snipe eel  
Pleuronectiformes Achiropsettidae Neoachiropsetta milfordinative Finless flounder  
Zeiformes Oreosomatidae Neocyttus rhomboidalisnative Spiky oreo  
Cyprinodontiformes Rivulidae Neofundulus ornatipinnisnative   
Stomiiformes Stomiidae Neonesthes capensisnative Cape snaggletooth  
Notacanthiformes Notacanthidae Notacanthus chemnitziinative Snubnosed spiny eel  
Atheriniformes Notocheiridae Notocheirus hubbsinative   
Aulopiformes Paralepididae Notolepis annulatanative Ringed barracudina  
Myctophiformes Myctophidae Notolychnus valdiviaenative Topside lampfish  
Perciformes Zoarcidae Notolycodes schmidtinative   
Myxiniformes Myxinidae Notomyxine tridentigernative   
Gadiformes Moridae Notophycis marginatanative Dwarf codling Brótola 
Syngnathiformes Centriscidae Notopogon fernandezianusnative Orange bellowfish Pez trompeta 
Hexanchiformes Hexanchidae Notorynchus cepedianusnative Broadnose sevengill shark  
Myctophiformes Myctophidae Notoscopelus caudispinosusnative Lobisomem  
Myctophiformes Myctophidae Notoscopelus resplendensnative Patchwork lampfish  
Atheriniformes Atherinopsidae Odontesthes argentinensisnative  Baboso 
Atheriniformes Atherinopsidae Odontesthes bonariensisnative Argentinian silverside Pejerrey 
Atheriniformes Atherinopsidae Odontesthes hatcherinative  pejerrey 
Atheriniformes Atherinopsidae Odontesthes humensisnative   
Atheriniformes Atherinopsidae Odontesthes incisanative  Cornalito 
Atheriniformes Atherinopsidae Odontesthes nigricansnative   
Atheriniformes Atherinopsidae Odontesthes orientalisnative   
Atheriniformes Atherinopsidae Odontesthes perugiaenative  juncalero 
Atheriniformes Atherinopsidae Odontesthes platensisnative   
Atheriniformes Atherinopsidae Odontesthes smittinative   
Characiformes Characidae Odontostilbe microcephalanative  mojarra 
Characiformes Characidae Odontostilbe paraguayensisnative   
Characiformes Characidae Odontostilbe pequiranative  mojarra 
Perciformes Zoarcidae Oidiphorus brevisnative   
Perciformes Carangidae Oligoplites saliensnative Castin leatherjacket  
Perciformes Carangidae Oligoplites saurusnative Leatherjacket  
Characiformes Characidae Oligosarcus amomenative   
Characiformes Characidae Oligosarcus bolivianusnative  Dientudo 
Characiformes Characidae Oligosarcus breviorisnative  dientudo 
Characiformes Characidae Oligosarcus hepsetusnative   
Characiformes Characidae Oligosarcus itaunative   
Characiformes Characidae Oligosarcus jenynsiinative  dentudo 
Characiformes Characidae Oligosarcus longirostrisnative  dientudo 
Characiformes Characidae Oligosarcus menezesiendemic   
Characiformes Characidae Oligosarcus oligolepisnative  blanquillo 
Characiformes Characidae Oligosarcus paranensisnative  dientudo 
Siluriformes Diplomystidae Olivaichthys cuyanusnative  bagre aterciopelado 
Siluriformes Diplomystidae Olivaichthys mesembrinusnative   
Siluriformes Diplomystidae Olivaichthys viedmensisnative Otuno Bagre aterciopelado 
Pleuronectiformes Pleuronectidae Oncopterus darwiniinative Remo flounder Lenguado 
Salmoniformes Salmonidae Oncorhynchus kisutchintroduced Coho salmon  
Salmoniformes Salmonidae Oncorhynchus mykissintroduced Rainbow trout trucha arco iris 
Salmoniformes Salmonidae Oncorhynchus tshawytschaintroduced Chinook salmon  
Lophiiformes Oneirodidae Oneirodes notiusnative   
Perciformes Sciaenidae Ophioscion adustusnative Croaker Burriqueta 
Clupeiformes Clupeidae Opisthonema oglinumnative Atlantic thread herring  
Siluriformes Doradidae Ossancora eigenmanninative  Armado 
Siluriformes Loricariidae Otocinclus arnoldinative   
Siluriformes Loricariidae Otocinclus vittatusnative   
Siluriformes Doradidae Oxydoras knerinative  Armao 
Perciformes Sciaenidae Pachypops fourcroinative Guyanan croaker  
Perciformes Sciaenidae Pachyurus bonariensisnative La Plata croaker Corvina del rio 
Perciformes Sparidae Pagrus pagrusnative Red porgy Besugo 
Cyprinodontiformes Rivulidae Papiliolebias bitterinative   
Cyprinodontiformes Rivulidae Papiliolebias hatinnenative   
Perciformes Blenniidae Parablennius pilicornisnative Ringneck blenny  
Perciformes Gempylidae Paradiplospinus antarcticusnative Antarctic escolar  
Pleuronectiformes Paralichthyidae Paralichthys isoscelesnative  Lenguado 
Pleuronectiformes Paralichthyidae Paralichthys orbignyanusnative   
Pleuronectiformes Paralichthyidae Paralichthys patagonicusnative Patagonian flounder  
Scorpaeniformes Liparidae Paraliparis aspersusnative   
Scorpaeniformes Liparidae Paraliparis hubbsinative   
Perciformes Sciaenidae Paralonchurus brasiliensisnative Banded croaker  
Siluriformes Loricariidae Paraloricaria agastornative   
Siluriformes Loricariidae Paraloricaria commersonoidesnative  Vieja 
Siluriformes Loricariidae Paraloricaria vetulanative  Vieja 
Perciformes Nototheniidae Paranotothenia magellanicanative Magellanic rockcod  
Siluriformes Pimelodidae Parapimelodus valenciennisnative  bagarito 
Siluriformes Trichomycteridae Parastegophilus maculatusnative  camarón 
Siluriformes Trichomycteridae Paravandellia oxypteranative Pantanal parasitic catfish chupa sangre 
Characiformes Parodontidae Parodon carrikerinative   
Characiformes Parodontidae Parodon nasusnative  Boguita 
Characiformes Parodontidae Parodon suborbitalisnative   
Perciformes Carangidae Parona signatanative Parona leatherjacket Palometa 
Perciformes Nototheniidae Patagonotothen brevicauda brevicaudanative Patagonian rockcod  
Perciformes Nototheniidae Patagonotothen cornucolanative   
Perciformes Nototheniidae Patagonotothen elegansnative   
Perciformes Nototheniidae Patagonotothen guntherinative Yellowfin notothen  
Perciformes Nototheniidae Patagonotothen jordaninative   
Perciformes Nototheniidae Patagonotothen ramsayinative Longtail southern cod  
Perciformes Nototheniidae Patagonotothen simanative   
Perciformes Nototheniidae Patagonotothen tessellatanative Black southern cod  
Perciformes Nototheniidae Patagonotothen wiltoninative   
Clupeiformes Pristigasteridae Pellona flavipinnisnative Yellowfin river pellona Lacha 
Perciformes Pentacerotidae Pentaceros richardsoninative Pelagic armourhead  
Perciformes Stromateidae Peprilus crenulatusnative   
Perciformes Stromateidae Peprilus parunative American harvestfish  
Perciformes Stromateidae Peprilus xamthurusnative   
Perciformes Percichthyidae Percichthys colhuapiensisendemic Largemouth perch Percas boconas 
Perciformes Percichthyidae Percichthys laevisnative   
Perciformes Percichthyidae Percichthys truchaendemic Creole perch Percas de boca chica 
Perciformes Percophidae Percophis brasiliensisnative Brazilian flathead Congrio real 
Cyprinodontiformes Poeciliidae Phalloceros caudimaculatusnative Dusky millions fish barrigudinho 
Cyprinodontiformes Poeciliidae Phalloptychus januariusnative   
Cyprinodontiformes Poeciliidae Phallotorynus victoriaenative  Madrecita 
Characiformes Characidae Phenacogaster tegatusnative   
Stomiiformes Stomiidae Photonectes brauerinative Brauer's dragonfish  
Stomiiformes Stomiidae Photonectes mirabilisnative Blueband dragonfish  
Perciformes Zoarcidae Phucocoetes latitansnative   
Characiformes Iguanodectidae Piabucus melanostomanative   
Characiformes Serrasalmidae Piaractus mesopotamicusnative Pacu baya 
Perciformes Zoarcidae Piedrabuenia ringueletinative   
Siluriformes Heptapteridae Pimelodella cristatanative   
Siluriformes Heptapteridae Pimelodella gracilisnative Graceful pimelodella bagre 
Siluriformes Heptapteridae Pimelodella griffininative   
Siluriformes Heptapteridae Pimelodella howesinative   
Siluriformes Heptapteridae Pimelodella laticepsnative  bagre cantor 
Siluriformes Heptapteridae Pimelodella taeniophoranative   
Siluriformes Pimelodidae Pimelodus absconditusnative  bagre 
Siluriformes Pimelodidae Pimelodus albicansendemic  bagre 
Siluriformes Pimelodidae Pimelodus argenteusnative  bagre 
Siluriformes Pimelodidae Pimelodus blochiinative Bloch's catfish  
Siluriformes Pimelodidae Pimelodus brevisendemic  bagre 
Siluriformes Pimelodidae Pimelodus maculatusnative  amarillo 
Siluriformes Pimelodidae Pimelodus mysteriosusnative   
Siluriformes Pimelodidae Pimelodus ornatusnative  bagre 
Siluriformes Pimelodidae Pimelodus ortmanninative   
Perciformes Pinguipedidae Pinguipes brasilianusnative Brazilian sandperch Turco 
Perciformes Sciaenidae Plagioscion squamosissimusnative South American silver croaker Corvina 
Perciformes Sciaenidae Plagioscion ternetzinative Freshwater croaker Corvina 
Clupeiformes Clupeidae Platanichthys platananative River Plate sprat Mandufia 
Siluriformes Doradidae Platydoras armatulusnative Southern striped raphael Armado 
Siluriformes Doradidae Platydoras costatusnative Raphael catfish armado 
Perciformes Zoarcidae Plesienchelys stehmanninative   
Perciformes Sciaenidae Pogonias cromisnative Black drum  
Perciformes Zoarcidae Pogonolycus elegansnative   
Perciformes Zoarcidae Pogonolycus marinaenative   
Perciformes Polynemidae Polydactylus oligodonnative Littlescale threadfin  
Perciformes Polynemidae Polydactylus virginicusnative Barbu  
Perciformes Polyprionidae Polyprion americanusnative Wreckfish Mero 
Perciformes Pomatomidae Pomatomus saltatrixnative Bluefish Anchoa 
Characiformes Characidae Poptella paraguayensisnative  Mojarra 
Batrachoidiformes Batrachoididae Porichthys porosissimusnative  Bagre 
Stephanoberyciformes Melamphaidae Poromitra atlanticanative   
Siluriformes Trichomycteridae Potamoglanis johnsoninative   
Characiformes Curimatidae Potamorhina squamoralevisnative  Blanquillo 
Beloniformes Belonidae Potamorrhaphis eigenmanninative  pez aguja 
Myliobatiformes Potamotrygonidae Potamotrygon amandaenative   
Myliobatiformes Potamotrygonidae Potamotrygon falknerinative Largespot river stingray Raya 
Myliobatiformes Potamotrygonidae Potamotrygon hystrixnative Porcupine river stingray Raya 
Myliobatiformes Potamotrygonidae Potamotrygon motoronative South American freshwater stingray Arraia 
Myliobatiformes Potamotrygonidae Potamotrygon schuhmacherinative   
Perciformes Priacanthidae Priacanthus arenatusnative Atlantic bigeye  
Carcharhiniformes Carcharhinidae Prionace glaucanative Blue shark  
Characiformes Characidae Prionobrama paraguayensisnative   
Scorpaeniformes Triglidae Prionotus nudigulanative Red searobin  
Scorpaeniformes Triglidae Prionotus punctatusnative Bluewing searobin Testolín de aleta azul 
Rhinopristiformes Pristidae Pristis pectinatanative Smalltooth sawfish  
Characiformes Prochilodontidae Prochilodus lineatusnative Streaked prochilod Carimbatá 
Characiformes Prochilodontidae Prochilodus nigricansnative Black prochilodus  
Myctophiformes Myctophidae Protomyctophum choriodonnative Gaptooth lanternfish  
Myctophiformes Myctophidae Protomyctophum parallelumnative Parallel lanternfish  
Myctophiformes Myctophidae Protomyctophum tenisoninative Tenison’s lanternfish  
Rajiformes Arhynchobatidae Psammobatis berginative Blotched sand skate  
Rajiformes Arhynchobatidae Psammobatis extentanative Zipper sand skate  
Rajiformes Arhynchobatidae Psammobatis lentiginosanative Freckled sand skate  
Rajiformes Arhynchobatidae Psammobatis normaninative Shortfin sand skate  
Rajiformes Arhynchobatidae Psammobatis parvacaudanative Smalltail sand skate  
Rajiformes Arhynchobatidae Psammobatis rudisnative Smallthorn sand skate  
Rajiformes Arhynchobatidae Psammobatis rutrumnative Spade sand skate  
Rajiformes Arhynchobatidae Psammobatis scobinanative Raspthorn sand skate  
Characiformes Curimatidae Psectrogaster curviventrisnative  Blanquillo 
Characiformes Characidae Psellogrammus kennedyinative  Mojarrita 
Characiformes Anostomidae Pseudanos trimaculatusnative Threespot headstander  
Rhinopristiformes Rhinobatidae Pseudobatos horkeliinative Brazilian guitarfish  
Rhinopristiformes Rhinobatidae Pseudobatos percellensnative Chola guitarfish  
Siluriformes Aspredinidae Pseudobunocephalus iheringiinative  guitarrita 
Siluriformes Aspredinidae Pseudobunocephalus rugosusnative  guitarrita 
Characiformes Characidae Pseudocorynopoma doriaenative Dragonfin tetra Mojarra de velo 
Zeiformes Oreosomatidae Pseudocyttus maculatusnative Smooth oreo dory  
Siluriformes Loricariidae Pseudohemiodon devincenziinative   
Siluriformes Loricariidae Pseudohemiodon laticepsnative  Vieja 
Siluriformes Loricariidae Pseudohemiodon platycephalusnative   
Perciformes Pinguipedidae Pseudopercis numidanative Namorado sandperch  
Perciformes Pinguipedidae Pseudopercis semifasciatanative Argentinian sandperch Chanchito 
Siluriformes Pseudopimelodidae Pseudopimelodus mangurusnative  Manguruyú amarillo 
Siluriformes Pimelodidae Pseudoplatystoma corruscansnative Spotted sorubim cachorro (juvenil) 
Siluriformes Pimelodidae Pseudoplatystoma fasciatumnative Barred sorubim cachorro (juvenil) 
Siluriformes Pimelodidae Pseudoplatystoma reticulatumnative   
Beloniformes Belonidae Pseudotylosurus angusticepsnative  aguja de rio 
Beloniformes Belonidae Pseudotylosurus micropsnative   
Scorpaeniformes Psychrolutidae Psychrolutes marmoratusnative   
Siluriformes Aspredinidae Pterobunocephalus depressusnative   
Siluriformes Doradidae Pterodoras granulosusnative Granulated catfish Armado común 
Cyprinodontiformes Rivulidae Pterolebias longipinnisnative Longfin killie  
Siluriformes Loricariidae Pterygoplichthys anisitsinative Snow pleco Vieja de agua 
Characiformes Serrasalmidae Pygocentrus nattererinative Red piranha coicoa 
Characiformes Lebiasinidae Pyrrhulina australisnative  pirrulina 
Characiformes Lebiasinidae Pyrrhulina melanostomanative Blackmouth pyrrhulina  
Characiformes Lebiasinidae Pyrrhulina rachoviananative Fanning pyrrhulina  
Perciformes Rachycentridae Rachycentron canadumnative Cobia  
Clupeiformes Clupeidae Ramnogaster arcuatanative Jenyns's sprat Sardina 
Clupeiformes Clupeidae Ramnogaster melanostomanative Uruguay river sprat Mandufia 
Ophidiiformes Ophidiidae Raneya brasiliensisnative Banded cusk eel  
Lampriformes Regalecidae Regalecus glesnenative King of herrings  
Perciformes Echeneidae Remora remoranative Shark sucker  
Siluriformes Heptapteridae Rhamdella aymaraeendemic   
Siluriformes Heptapteridae Rhamdella cainguaenative   
Siluriformes Heptapteridae Rhamdella jenynsiinative   
Siluriformes Heptapteridae Rhamdia quelennative South American catfish bagre 
Gymnotiformes Rhamphichthyidae Rhamphichthys hahniendemic   
Gymnotiformes Rhamphichthyidae Rhamphichthys rostratusnative  anguila picuda 
Characiformes Cynodontidae Rhaphiodon vulpinusnative Biara Machete 
Orectolobiformes Rhincodontidae Rhincodon typusnative Whale shark  
Siluriformes Loricariidae Rhinelepis asperanative  acarí 
Siluriformes Loricariidae Rhinelepis strigosanative  Vieja 
Siluriformes Doradidae Rhinodoras dorbignyinative  Marieta 
Myliobatiformes Myliobatidae Rhinoptera bonasusnative Cownose ray  
Perciformes Clinidae Ribeiroclinus eigenmanninative   
Siluriformes Loricariidae Ricola macropsnative  Vieja de cola 
Siluriformes Loricariidae Rineloricaria catamarcensisnative  Vieja 
Siluriformes Loricariidae Rineloricaria felipponeinative  vieja 
Siluriformes Loricariidae Rineloricaria isaacinative   
Siluriformes Loricariidae Rineloricaria limanative  vieja de aqua 
Siluriformes Loricariidae Rineloricaria microlepidogasternative  vieja 
Siluriformes Loricariidae Rineloricaria misioneranative   
Siluriformes Loricariidae Rineloricaria parvanative  Vieja de agua 
Rajiformes Arhynchobatidae Rioraja agassiziinative Rio skate  
Characiformes Characidae Roeboides descalvadensisnative Parana scale-eating characin Dientudo 
Characiformes Characidae Roeboides microlepisnative  Dentudo 
Characiformes Characidae Roeboides prognathusnative  Dientudo 
Cetomimiformes Rondeletiidae Rondeletia loricatanative Redmouth whalefish  
Perciformes Epigonidae Rosenblattia robustanative Stout cardinalfish  
Perciformes Gempylidae Ruvettus pretiosusnative Oilfish  
Gadiformes Moridae Salilota australisnative Tadpole codling Bacalao austral 
Characiformes Bryconidae Salminus brasiliensisnative Dorado Dorado 
Characiformes Bryconidae Salminus hilariinative  Dorado plateado 
Salmoniformes Salmonidae Salmo salarintroduced Atlantic salmon Landloked salmon 
Salmoniformes Salmonidae Salmo truttaintroduced Sea trout trucha europea 
Salmoniformes Salmonidae Salvelinus fontinalisintroduced Brook trout trucha de arroyo 
Salmoniformes Salmonidae Salvelinus namaycushintroduced Lake trout trucha de lago 
Perciformes Scombridae Sarda sardanative Atlantic bonito Bonito 
Clupeiformes Clupeidae Sardinella auritanative Round sardinella  
Aulopiformes Synodontidae Saurida brasiliensisnative Brazilian lizardfish  
Perciformes Scaridae Scarus guacamaianative Rainbow parrotfish  
Perciformes Centrolophidae Schedophilus griseolineatusnative   
Characiformes Anostomidae Schizodon borelliinative  Aracú pintado 
Characiformes Anostomidae Schizodon isognathusnative   
Characiformes Anostomidae Schizodon nasutusnative  Boga 
Characiformes Anostomidae Schizodon plataeendemic   
Characiformes Anostomidae Schizodon succinctusnative   
Carcharhiniformes Scyliorhinidae Schroederichthys biviusnative Narrowmouthed catshark  
Perciformes Scombridae Scomber coliasnative Atlantic chub mackerel  
Perciformes Scombridae Scomber japonicusnative Chub mackerel Magrú 
Beloniformes Scomberesocidae Scomberesox saurusnative Atlantic saury  
Beloniformes Scomberesocidae Scomberesox scombroidesnative King gar Aguja 
Aulopiformes Scopelarchidae Scopelarchoides krefftinative Twin-striped pearleye  
Myctophiformes Myctophidae Scopelopsis multipunctatusnative Multispotted lanternfish  
Aulopiformes Notosudidae Scopelosaurus hamiltoninative Smallscale waryfish  
Aulopiformes Notosudidae Scopelosaurus lepidusnative Blackfin waryfish  
Carcharhiniformes Scyliorhinidae Scyliorhinus boanative Boa catshark  
Carcharhiniformes Scyliorhinidae Scyliorhinus haeckeliinative Freckled catshark  
Scorpaeniformes Sebastidae Sebastes oculatusnative Patagonian redfish Cabarilla 
Perciformes Carangidae Selar crumenophthalmusnative Bigeye scad  
Perciformes Carangidae Selene setapinnisnative Atlantic moonfish  
Perciformes Carangidae Selene vomernative Lookdown  
Perciformes Carangidae Seriola lalandinative Yellowtail amberjack  
Perciformes Carangidae Seriola rivoliananative Longfin yellowtail  
Perciformes Centrolophidae Seriolella caeruleanative White warehou Cojinova 
Perciformes Centrolophidae Seriolella porosanative Choicy ruff Savorín 
Perciformes Centrolophidae Seriolella punctatanative Silver warehou  
Characiformes Characidae Serrapinnus calliurusnative  mojarra curvada 
Characiformes Characidae Serrapinnus notomelasnative   
Characiformes Serrasalmidae Serrasalmus auriventrisnative   
Characiformes Serrasalmidae Serrasalmus maculatusnative   
Characiformes Serrasalmidae Serrasalmus marginatusnative  catirina 
Characiformes Serrasalmidae Serrasalmus nigricaudanative   
Characiformes Serrasalmidae Serrasalmus spilopleuranative Speckled piranha catirina 
Siluriformes Trichomycteridae Silvinichthys bortayronative   
Siluriformes Trichomycteridae Silvinichthys gualcamayonative   
Siluriformes Trichomycteridae Silvinichthys huachinative   
Siluriformes Trichomycteridae Silvinichthys leoncitensisnative   
Siluriformes Trichomycteridae Silvinichthys mendozensisnative   
Stephanoberyciformes Melamphaidae Sio nordenskjoldiinative Nordenskjold's bigscale  
Squaliformes Somniosidae Somniosus antarcticusnative Southern sleeper shark  
Siluriformes Pimelodidae Sorubim limanative Duckbill catfish bico de pato 
Siluriformes Loricariidae Spatuloricaria evansiinative  vieja 
Tetraodontiformes Tetraodontidae Sphoeroides pachygasternative Blunthead puffer  
Perciformes Sphyraenidae Sphyraena guachanchonative Guachanche barracuda  
Carcharhiniformes Sphyrnidae Sphyrna lewininative Scalloped hammerhead  
Carcharhiniformes Sphyrnidae Sphyrna tiburonative Bonnethead  
Carcharhiniformes Sphyrnidae Sphyrna tudesnative Smalleye hammerhead  
Carcharhiniformes Sphyrnidae Sphyrna zygaenanative Smooth hammerhead  
Clupeiformes Clupeidae Sprattus fuegensisnative Falkland sprat Sardina 
Squaliformes Dalatiidae Squaliolus laticaudusnative Spined pygmy shark  
Squaliformes Squalidae Squalus acanthiasnative Picked dogfish  
Squaliformes Squalidae Squalus blainvillenative Longnose spurdog  
Squaliformes Squalidae Squalus cubensisnative Cuban dogfish  
Squaliformes Squalidae Squalus lobularisnative Atlantic lobefin dogfish  
Squaliformes Squalidae Squalus mitsukuriinative Shortspine spurdog  
Squatiniformes Squatinidae Squatina argentinanative Argentine angelshark  
Squatiniformes Squatinidae Squatina guggenheimnative Angular angel shark  
Squatiniformes Squatinidae Squatina occultanative Hidden angel shark  
Squatiniformes Squatinidae Squatina punctatanative   
Siluriformes Pimelodidae Steindachneridion scriptumnative  bagre 
Characiformes Curimatidae Steindachnerina biornatanative   
Characiformes Curimatidae Steindachnerina brevipinnanative  Blanquillo 
Characiformes Curimatidae Steindachnerina conspersanative   
Tetraodontiformes Monacanthidae Stephanolepis hispidusnative Planehead filefish  
Stomiiformes Sternoptychidae Sternoptyx diaphananative Diaphanous hatchet fish  
Gymnotiformes Sternopygidae Sternopygus macrurusnative Longtail knifefish cuchilla 
Stomiiformes Stomiidae Stomias affinisnative Günther's boafish  
Stomiiformes Stomiidae Stomias boa boanative Boa dragonfish  
Stomiiformes Stomiidae Stomias gracilisnative   
Stomiiformes Stomiidae Stomias longibarbatusnative Longbarb scaly dragonfish  
Perciformes Stromateidae Stromateus brasiliensisnative Southwest Atlantic butterfish Pampanito 
Siluriformes Loricariidae Sturisoma barbatumnative  vieja 
Siluriformes Loricariidae Sturisoma robustumnative   
Myctophiformes Myctophidae Symbolophorus barnardinative Barnards lanternfishes  
Myctophiformes Myctophidae Symbolophorus boopsnative Bogue lanternfish  
Pleuronectiformes Cynoglossidae Symphurus jenynsinative Jenyn's tonguefish sol 
Pleuronectiformes Cynoglossidae Symphurus tessellatusnative   
Pleuronectiformes Cynoglossidae Symphurus trewavasaenative Trewavas' tonguefish  
Rajiformes Arhynchobatidae Sympterygia acutanative Bignose fanskate  
Rajiformes Arhynchobatidae Sympterygia bonapartiinative Smallnose fanskate  
Synbranchiformes Synbranchidae Synbranchus marmoratusnative Marbled swamp eel anguila 
Syngnathiformes Syngnathidae Syngnathus acusnative Greater pipefish  
Syngnathiformes Syngnathidae Syngnathus follettinative   
Syngnathiformes Syngnathidae Syngnathus pelagicusnative Sargassum pipefish  
Myctophiformes Myctophidae Taaningichthys bathyphilusnative Deepwater lanternfish  
Characiformes Characidae Tetragonopterus argenteusnative  Chanquete 
Characiformes Characidae Tetragonopterus signatusnative   
Torpediniformes Torpedinidae Tetronarce puelchanative Argentine torpedo  
Batrachoidiformes Batrachoididae Thalassophryne montevidensisnative   
Characiformes Gasteropelecidae Thoracocharax stellatusnative Spotfin hatchetfish Chirola 
Perciformes Scombridae Thunnus alalunganative Albacore Albacora 
Perciformes Scombridae Thunnus albacaresnative Yellowfin tuna Aleta amarilla 
Perciformes Scombridae Thunnus maccoyiinative Southern bluefin tuna  
Perciformes Scombridae Thunnus obesusnative Bigeye tuna Ojos grandes 
Perciformes Scombridae Thunnus thynnusnative Atlantic bluefin tuna Atún aleta azul 
Perciformes Gempylidae Thyrsites atunnative Snoek Pez sierra 
Perciformes Gempylidae Thyrsitops lepidopoidesnative White snake mackerel Caballa blanca 
Pleuronectiformes Paralichthyidae Thysanopsetta naresinative  Lenguado 
Siluriformes Auchenipteridae Trachelyopterus albicruxnative  bagre cruz blanca 
Siluriformes Auchenipteridae Trachelyopterus ceratophysusnative   
Siluriformes Auchenipteridae Trachelyopterus galeatusnative   
Siluriformes Auchenipteridae Trachelyopterus teagueinative  bagre 
Perciformes Carangidae Trachinotus carolinusnative Florida pompano Pampano 
Perciformes Carangidae Trachinotus goodeinative Great pompano  
Perciformes Carangidae Trachinotus marginatusnative Plata pompano  
Lampriformes Trachipteridae Trachipterus jacksonensisnative Blackflash ribbonfish  
Perciformes Carangidae Trachurus lathaminative Rough scad Surel 
Perciformes Carangidae Trachurus murphyinative Chilean jack mackerel  
Siluriformes Doradidae Trachydoras paraguayensisnative  Armado 
Batrachoidiformes Batrachoididae Triathalassothia argentinanative   
Perciformes Trichiuridae Trichiurus lepturusnative Largehead hairtail Sabre 
Siluriformes Trichomycteridae Trichomycterus alterusnative   
Siluriformes Trichomycteridae Trichomycterus belensisnative   
Siluriformes Trichomycteridae Trichomycterus borelliinative   
Siluriformes Trichomycteridae Trichomycterus boyleinative   
Siluriformes Trichomycteridae Trichomycterus catamarcensisendemic   
Siluriformes Trichomycteridae Trichomycterus corduvensisnative   
Siluriformes Trichomycteridae Trichomycterus heterodontusnative   
Siluriformes Trichomycteridae Trichomycterus hualconative   
Siluriformes Trichomycteridae Trichomycterus minusnative   
Siluriformes Trichomycteridae Trichomycterus pseudosilvinichthysnative   
Siluriformes Trichomycteridae Trichomycterus ramosusnative   
Siluriformes Trichomycteridae Trichomycterus riojanusnative   
Siluriformes Trichomycteridae Trichomycterus roiginative   
Siluriformes Trichomycteridae Trichomycterus spegazziniinative  yuska 
Siluriformes Trichomycteridae Trichomycterus tenuisnative  bagre serrano 
Siluriformes Trichomycteridae Trichomycterus yuskaendemic   
Siluriformes Trichomycteridae Tridentopsis cahualinative   
Cyprinodontiformes Rivulidae Trigonectes aplocheiloidesnative   
Cyprinodontiformes Rivulidae Trigonectes balzaniinative   
Stomiiformes Stomiidae Trigonolampa miricepsnative Threelight dragonfish  
Characiformes Triportheidae Triportheus angulatusnative  Sapo 
Characiformes Triportheidae Triportheus nematurusnative   
Characiformes Triportheidae Triportheus paranensisnative Tetra Dientudo 
Perciformes Sciaenidae Umbrina canosainative Argentine croaker Pargo blanco 
Gadiformes Phycidae Urophycis brasiliensisnative Brazilian codling Brótola 
Gadiformes Phycidae Urophycis cirratanative Gulf hake Brótola 
Gadiformes Phycidae Urophycis mystaceanative   
Scorpaeniformes Liparidae Volodichthys herwiginative   
Scorpaeniformes Liparidae Volodichthys smirnovinative   
Stomiiformes Phosichthyidae Woodsia meyerwaardeninative Austral lightfish  
Perciformes Xiphiidae Xiphias gladiusnative Swordfish Pez espada 
Siluriformes Aspredinidae Xyliphius barbatusnative  guitarrita 
Pleuronectiformes Paralichthyidae Xystreurys rasilenative  Lenguado 
Rhinopristiformes Rhinobatidae Zapteryx brevirostrisnative Lesser guitarfish  
Rajiformes Rajidae Zearaja chilensisnative Yellownose skate  
Zeiformes Zeidae Zenopsis conchifernative Silvery John dory San Pedro 
Siluriformes Pimelodidae Zungaro jahunative  Manguruyu 
Siluriformes Pimelodidae Zungaro zungaronative Gilded catfish apretador 
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