| Order | Family | Species | Occurrence | FishBase name | Name in Country |
|---|---|---|---|---|---|
| Characiformes | Anostomidae | Abramites hypselonotus | native | Marbled headstander | |
| Characiformes | Characidae | Acanthocharax microlepis | native | ||
| Siluriformes | Doradidae | Acanthodoras cataphractus | native | Spiny catfish | |
| Siluriformes | Doradidae | Acanthodoras spinosissimus | native | Talking catfish | Kiru-kiru |
| Cichliformes | Cichlidae | Acarichthys heckelii | native | Threadfin acara | |
| Cichliformes | Cichlidae | Acaronia nassa | native | Bigeye cichlid | |
| Characiformes | Acestrorhynchidae | Acestrorhynchus falcatus | native | ||
| Characiformes | Acestrorhynchidae | Acestrorhynchus falcirostris | native | ||
| Characiformes | Acestrorhynchidae | Acestrorhynchus microlepis | native | Pike characin | |
| Characiformes | Acestrorhynchidae | Acestrorhynchus nasutus | native | ||
| Pleuronectiformes | Achiridae | Achirus achirus | native | Drab sole | |
| Characiformes | Serrasalmidae | Acnodon oligacanthus | native | ||
| Cichliformes | Cichlidae | Aequidens potaroensis | endemic | ||
| Cichliformes | Cichlidae | Aequidens tetramerus | native | Saddle cichlid | |
| Siluriformes | Auchenipteridae | Ageneiosus inermis | native | Manduba | |
| Siluriformes | Auchenipteridae | Ageneiosus marmoratus | native | Bottlenose catfish | |
| Siluriformes | Auchenipteridae | Ageneiosus ucayalensis | native | ||
| Characiformes | Triportheidae | Agoniates halecinus | native | ||
| Gymnotiformes | Hypopomidae | Akawaio penak | endemic | ||
| Siluriformes | Doradidae | Amblydoras affinis | native | Saurauwari | |
| Characiformes | Crenuchidae | Ammocryptocharax lateralis | native | ||
| Characiformes | Crenuchidae | Ammocryptocharax vintonae | native | ||
| Cyprinodontiformes | Anablepidae | Anableps anableps | native | Largescale foureyes | Foureye |
| Cyprinodontiformes | Anablepidae | Anableps microlepis | native | Foureyes | Foureye |
| Cyprinodontiformes | Rivulidae | Anablepsoides holmiae | endemic | ||
| Cyprinodontiformes | Rivulidae | Anablepsoides lanceolatus | endemic | ||
| Cyprinodontiformes | Rivulidae | Anablepsoides mazaruni | endemic | ||
| Cyprinodontiformes | Rivulidae | Anablepsoides stagnatus | native | ||
| Cyprinodontiformes | Rivulidae | Anablepsoides waimacui | endemic | ||
| Clupeiformes | Engraulidae | Anchoa spinifer | native | Spicule anchovy | Herring |
| Clupeiformes | Engraulidae | Anchovia surinamensis | native | Surinam anchovy | |
| Clupeiformes | Engraulidae | Anchoviella guianensis | native | Guyana anchovy | |
| Clupeiformes | Engraulidae | Anchoviella lepidentostole | native | Broadband anchovy | |
| Clupeiformes | Engraulidae | Anchoviella manamensis | native | Manamo anchovy | |
| Siluriformes | Loricariidae | Ancistrus dolichopterus | native | Bushymouth catfish | |
| Siluriformes | Loricariidae | Ancistrus hoplogenys | native | ||
| Siluriformes | Loricariidae | Ancistrus kellerae | native | ||
| Siluriformes | Loricariidae | Ancistrus leucostictus | native | ||
| Siluriformes | Loricariidae | Ancistrus lithurgicus | native | ||
| Siluriformes | Loricariidae | Ancistrus nudiceps | endemic | ||
| Siluriformes | Loricariidae | Ancistrus saudades | native | ||
| Characiformes | Anostomidae | Anostomoides laticeps | native | ||
| Characiformes | Anostomidae | Anostomus anostomus | native | Striped headstander | |
| Characiformes | Anostomidae | Anostomus ternetzi | native | ||
| Characiformes | Parodontidae | Apareiodon agmatos | native | ||
| Characiformes | Parodontidae | Apareiodon gransabana | native | ||
| Characiformes | Characidae | Aphyocharacidium melandetum | native | ||
| Characiformes | Characidae | Aphyocharax erythrurus | native | Flametail tetra | |
| Characiformes | Characidae | Aphyodite grammica | native | ||
| Pleuronectiformes | Achiridae | Apionichthys finis | native | Flounder | |
| Cichliformes | Cichlidae | Apistogramma ortmanni | native | ||
| Cichliformes | Cichlidae | Apistogramma rupununi | native | Two-spot Apistogramma | Two-spot Apistogramma |
| Cichliformes | Cichlidae | Apistogramma steindachneri | native | ||
| Gymnotiformes | Apteronotidae | Apteronotus albifrons | native | Black ghost | |
| Gymnotiformes | Apteronotidae | Apteronotus leptorhynchus | native | ||
| Siluriformes | Ariidae | Aspistor quadriscutis | native | Bressou sea catfish | |
| Siluriformes | Aspredinidae | Aspredinichthys filamentosus | native | Sevenbarbed banjo | |
| Siluriformes | Aspredinidae | Aspredinichthys tibicen | native | Tenbarbed banjo | |
| Siluriformes | Aspredinidae | Aspredo aspredo | native | Banjo catfish | |
| Characiformes | Characidae | Astyanax bimaculatus | native | Twospot astyanax | |
| Characiformes | Characidae | Astyanax rupununi | native | ||
| Siluriformes | Auchenipteridae | Auchenipterus ambyiacus | native | ||
| Siluriformes | Auchenipteridae | Auchenipterus brevior | native | ||
| Siluriformes | Auchenipteridae | Auchenipterus demerarae | native | ||
| Cyprinodontiformes | Rivulidae | Austrofundulus limnaeus | native | ||
| Cyprinodontiformes | Rivulidae | Austrofundulus rupununi | native | ||
| Gobiiformes | Gobiidae | Awaous flavus | native | ||
| Siluriformes | Pseudopimelodidae | Batrochoglanis raninus | native | ||
| Siluriformes | Pseudopimelodidae | Batrochoglanis villosus | native | ||
| Cichliformes | Cichlidae | Biotodoma cupido | native | Greenstreaked eartheater | |
| Characiformes | Hemiodontidae | Bivibranchia bimaculata | native | ||
| Characiformes | Hemiodontidae | Bivibranchia fowleri | native | ||
| Characiformes | Ctenoluciidae | Boulengerella cuvieri | native | ||
| Characiformes | Characidae | Brachychalcinus orbicularis | native | Discus tetra | |
| Siluriformes | Heptapteridae | Brachyglanis frenatus | native | ||
| Siluriformes | Heptapteridae | Brachyglanis melas | endemic | ||
| Siluriformes | Heptapteridae | Brachyglanis phalacra | endemic | ||
| Gymnotiformes | Hypopomidae | Brachyhypopomus beebei | native | ||
| Gymnotiformes | Hypopomidae | Brachyhypopomus brevirostris | native | Bluntnose knifefish | |
| Gymnotiformes | Hypopomidae | Brachyhypopomus bullocki | native | ||
| Gymnotiformes | Hypopomidae | Brachyhypopomus hendersoni | native | Knifefish | |
| Gymnotiformes | Hypopomidae | Brachyhypopomus pinnicaudatus | native | ||
| Gymnotiformes | Hypopomidae | Brachyhypopomus regani | native | Knife fish | |
| Gymnotiformes | Hypopomidae | Brachyhypopomus sullivani | native | ||
| Siluriformes | Pimelodidae | Brachyplatystoma filamentosum | native | Kumakuma | |
| Siluriformes | Pimelodidae | Brachyplatystoma vaillantii | native | Laulao catfish | Lalau |
| Siluriformes | Heptapteridae | Brachyrhamdia heteropleura | native | ||
| Characiformes | Bryconidae | Brycon amazonicus | native | ||
| Characiformes | Bryconidae | Brycon falcatus | native | ||
| Characiformes | Bryconidae | Brycon pesu | native | Mourning tetra | Pesu |
| Characiformes | Characidae | Bryconamericus cinarucoense | native | ||
| Characiformes | Characidae | Bryconamericus hyphesson | native | ||
| Characiformes | Iguanodectidae | Bryconops affinis | native | Orangefin tetra | |
| Characiformes | Iguanodectidae | Bryconops caudomaculatus | native | Tailspot tetra | |
| Siluriformes | Aspredinidae | Bunocephalus amaurus | native | Camouflaged catfish | |
| Siluriformes | Aspredinidae | Bunocephalus chamaizelus | native | ||
| Siluriformes | Aspredinidae | Bunocephalus verrucosus | native | Gnarled catfish | |
| Characiformes | Chilodontidae | Caenotropus labyrinthicus | native | ||
| Characiformes | Chilodontidae | Caenotropus maculosus | native | ||
| Siluriformes | Callichthyidae | Callichthys callichthys | native | Cascarudo | |
| Cichliformes | Cichlidae | Caquetaia spectabilis | native | ||
| Carcharhiniformes | Carcharhinidae | Carcharhinus leucas | native | Bull shark | |
| Characiformes | Gasteropelecidae | Carnegiella strigata | native | Marbled hatchetfish | |
| Siluriformes | Ariidae | Cathorops agassizii | native | ||
| Siluriformes | Ariidae | Cathorops arenatus | native | ||
| Siluriformes | Ariidae | Cathorops nuchalis | native | ||
| Characiformes | Serrasalmidae | Catoprion mento | native | Wimple piranha | |
| Siluriformes | Auchenipteridae | Centromochlus carolae | native | ||
| Carangaria/misc | Centropomidae | Centropomus ensiferus | native | Swordspine snook | Snoek |
| Carangaria/misc | Centropomidae | Centropomus parallelus | native | Fat snook | Grabb's snook |
| Siluriformes | Pseudopimelodidae | Cephalosilurus albomarginatus | endemic | ||
| Siluriformes | Cetopsidae | Cetopsidium minutum | native | ||
| Siluriformes | Cetopsidae | Cetopsidium roae | native | ||
| Siluriformes | Cetopsidae | Cetopsidium soniae | native | ||
| Siluriformes | Cetopsidae | Cetopsis aspis | native | ||
| Cichliformes | Cichlidae | Chaetobranchus flavescens | native | Kunapari | Camarapaca |
| Characiformes | Chalceidae | Chalceus epakros | native | ||
| Characiformes | Chalceidae | Chalceus macrolepidotus | native | Pinktail chalceus | |
| Characiformes | Chalceidae | Chalceus taeniatus | native | ||
| Characiformes | Crenuchidae | Characidium amaila | native | ||
| Characiformes | Crenuchidae | Characidium pellucidum | native | ||
| Characiformes | Crenuchidae | Characidium pteroides | native | ||
| Characiformes | Crenuchidae | Characidium steindachneri | native | ||
| Characiformes | Crenuchidae | Characidium zebra | native | ||
| Characiformes | Characidae | Charax gibbosus | native | Glass headstander | |
| Characiformes | Characidae | Charax hemigrammus | native | ||
| Characiformes | Characidae | Charax rupununi | native | ||
| Siluriformes | Heptapteridae | Chasmocranus brevior | native | ||
| Siluriformes | Heptapteridae | Chasmocranus longior | native | ||
| Characiformes | Chilodontidae | Chilodus punctatus | native | Spotted headstander | |
| Cichliformes | Cichlidae | Cichla ocellaris | native | Peacock cichlid | Lukanani |
| Cichliformes | Cichlidae | Cichla temensis | native | Speckled pavon | |
| Cichliformes | Cichlidae | Cichlasoma bimaculatum | native | Black acara | Common patwa |
| Cichliformes | Cichlidae | Cleithracara maronii | native | Keyhole cichlid | |
| Tetraodontiformes | Tetraodontidae | Colomesus asellus | native | Amazon puffer | |
| Characiformes | Serrasalmidae | Colossoma macropomum | introduced | Cachama | |
| Characiformes | Lebiasinidae | Copella arnoldi | native | Splash tetra | |
| Characiformes | Lebiasinidae | Copella eigenmanni | native | ||
| Characiformes | Lebiasinidae | Copella nattereri | native | Spotted tetra | |
| Siluriformes | Callichthyidae | Corydoras aeneus | native | Bronze corydoras | |
| Siluriformes | Callichthyidae | Corydoras blochi | native | Spotback corydoras | |
| Siluriformes | Callichthyidae | Corydoras bondi | native | Blackstripe corydoras | |
| Siluriformes | Callichthyidae | Corydoras griseus | native | Gray corydoras | |
| Siluriformes | Callichthyidae | Corydoras melanistius | native | Bluespotted corydoras | |
| Siluriformes | Callichthyidae | Corydoras potaroensis | native | Potaro cory | |
| Siluriformes | Callichthyidae | Corydoras sipaliwini | native | Nail cory | |
| Siluriformes | Loricariidae | Corymbophanes ameliae | native | ||
| Siluriformes | Loricariidae | Corymbophanes andersoni | native | ||
| Siluriformes | Loricariidae | Corymbophanes kaiei | native | ||
| Characiformes | Characidae | Creagrutus melanzonus | native | ||
| Cichliformes | Cichlidae | Crenicara punctulata | native | Checkerboard cichlid | |
| Cichliformes | Cichlidae | Crenicichla albopunctata | native | ||
| Cichliformes | Cichlidae | Crenicichla alta | native | Millet | |
| Cichliformes | Cichlidae | Crenicichla johanna | native | ||
| Cichliformes | Cichlidae | Crenicichla lugubris | native | ||
| Cichliformes | Cichlidae | Crenicichla reticulata | native | ||
| Cichliformes | Cichlidae | Crenicichla saxatilis | native | Ringtail pike cichlid | |
| Cichliformes | Cichlidae | Crenicichla strigata | native | ||
| Cichliformes | Cichlidae | Crenicichla vaillanti | native | ||
| Cichliformes | Cichlidae | Crenicichla wallacii | endemic | ||
| Characiformes | Crenuchidae | Crenuchus spilurus | native | Sailfin tetra | |
| Characiformes | Characidae | Ctenobrycon spilurus | native | Silver tetra | |
| Cypriniformes | Xenocyprididae | Ctenopharyngodon idella | introduced | Grass carp | |
| Characiformes | Curimatidae | Curimata cyprinoides | native | ||
| Characiformes | Curimatidae | Curimata roseni | native | ||
| Characiformes | Curimatidae | Curimata vittata | native | ||
| Characiformes | Curimatidae | Curimatella alburnus | native | ||
| Characiformes | Curimatidae | Curimatella immaculata | native | ||
| Characiformes | Curimatidae | Curimatopsis cryptica | native | ||
| Characiformes | Cynodontidae | Cynodon gibbus | native | ||
| Characiformes | Cynodontidae | Cynodon septenarius | native | ||
| Characiformes | Characidae | Cynopotamus essequibensis | native | ||
| Eupercaria/misc | Sciaenidae | Cynoscion acoupa | native | Acoupa weakfish | Grey snapper |
| Eupercaria/misc | Sciaenidae | Cynoscion steindachneri | native | Smalltooth weakfish | |
| Characiformes | Curimatidae | Cyphocharax festivus | native | ||
| Characiformes | Curimatidae | Cyphocharax helleri | native | ||
| Characiformes | Curimatidae | Cyphocharax microcephalus | native | ||
| Characiformes | Curimatidae | Cyphocharax spilurus | native | Cuticuru | |
| Siluriformes | Cetopsidae | Denticetopsis iwokrama | native | ||
| Siluriformes | Cetopsidae | Denticetopsis macilenta | native | ||
| Characiformes | Lebiasinidae | Derhamia hoffmannorum | endemic | ||
| Characiformes | Characidae | Deuterodon mutator | native | ||
| Characiformes | Characidae | Deuterodon potaroensis | native | ||
| Gymnotiformes | Sternopygidae | Distocyclus conirostris | native | ||
| Siluriformes | Doradidae | Doras carinatus | native | ||
| Siluriformes | Doradidae | Doras micropoeus | native | ||
| Gobiiformes | Eleotridae | Dormitator maculatus | native | Fat sleeper | |
| Gymnotiformes | Sternopygidae | Eigenmannia macrops | native | ||
| Gymnotiformes | Sternopygidae | Eigenmannia nigra | native | ||
| Gymnotiformes | Sternopygidae | Eigenmannia virescens | native | Glass knifefish | |
| Gymnotiformes | Gymnotidae | Electrophorus electricus | native | Electric eel | |
| Gobiiformes | Eleotridae | Eleotris amblyopsis | native | Large-scaled spinycheek sleeper | |
| Gobiiformes | Eleotridae | Eleotris pisonis | native | Spinycheek sleeper | |
| Characiformes | Erythrinidae | Erythrinus erythrinus | native | ||
| Eupercaria/misc | Gerreidae | Eucinostomus argenteus | native | Silver mojarra | |
| Eupercaria/misc | Gerreidae | Eugerres plumieri | native | Striped mojarra | |
| Characiformes | Characidae | Exodon paradoxus | native | Bucktooth tetra | |
| Siluriformes | Loricariidae | Farlowella nattereri | native | ||
| Siluriformes | Loricariidae | Farlowella reticulata | native | ||
| Siluriformes | Loricariidae | Farlowella rugosa | native | ||
| Characiformes | Gasteropelecidae | Gasteropelecus sternicla | native | River hatchetfish | |
| Cichliformes | Cichlidae | Geophagus brachybranchus | native | ||
| Cichliformes | Cichlidae | Geophagus crocatus | native | ||
| Siluriformes | Auchenipteridae | Gephyromochlus leopardus | native | ||
| Eupercaria/misc | Gerreidae | Gerres cinereus | native | Yellow fin mojarra | |
| Characiformes | Acestrorhynchidae | Gnathocharax steindachneri | native | ||
| Gobiiformes | Gobiidae | Gobioides grahamae | native | ||
| Gobiiformes | Eleotridae | Gobiomorus dormitor | native | Bigmouth sleeper | |
| Siluriformes | Heptapteridae | Goeldiella eques | native | ||
| Cichliformes | Cichlidae | Guianacara dacrya | native | ||
| Cichliformes | Cichlidae | Guianacara sphenozona | native | ||
| Characiformes | Characidae | Gymnocorymbus thayeri | native | False black tetra | |
| Gymnotiformes | Rhamphichthyidae | Gymnorhamphichthys rondoni | native | Mousetail knifefish | |
| Gymnotiformes | Gymnotidae | Gymnotus carapo | native | Banded knifefish | |
| Siluriformes | Doradidae | Hassar orestis | native | ||
| Siluriformes | Cetopsidae | Helogenes marmoratus | native | ||
| Siluriformes | Loricariidae | Hemiancistrus megacephalus | native | ||
| Characiformes | Characidae | Hemigrammus analis | native | ||
| Characiformes | Characidae | Hemigrammus cylindricus | native | ||
| Characiformes | Characidae | Hemigrammus erythrozonus | native | Glowlight tetra | |
| Characiformes | Characidae | Hemigrammus iota | native | ||
| Characiformes | Characidae | Hemigrammus ocellifer | native | Head-and-taillight tetra | |
| Characiformes | Characidae | Hemigrammus orthus | native | ||
| Characiformes | Characidae | Hemigrammus rodwayi | native | ||
| Characiformes | Characidae | Hemigrammus stictus | native | ||
| Characiformes | Characidae | Hemigrammus unilineatus | native | Featherfin tetra | |
| Siluriformes | Loricariidae | Hemiodontichthys acipenserinus | native | ||
| Characiformes | Hemiodontidae | Hemiodus amazonum | native | ||
| Characiformes | Hemiodontidae | Hemiodus argenteus | native | ||
| Characiformes | Hemiodontidae | Hemiodus atranalis | native | ||
| Characiformes | Hemiodontidae | Hemiodus quadrimaculatus | native | Barred hemiodus | |
| Characiformes | Hemiodontidae | Hemiodus semitaeniatus | native | Halfline hemiodus | |
| Characiformes | Hemiodontidae | Hemiodus unimaculatus | native | ||
| Characiformes | Hemiodontidae | Hemiodus vorderwinkleri | native | ||
| Siluriformes | Pimelodidae | Hemisorubim platyrhynchos | native | Porthole shovelnose catfish | |
| Siluriformes | Trichomycteridae | Henonemus taxistigmus | native | ||
| Characiformes | Acestrorhynchidae | Heterocharax macrolepis | native | ||
| Characiformes | Erythrinidae | Hoplerythrinus unitaeniatus | native | Aimara | |
| Characiformes | Erythrinidae | Hoplias aimara | native | ||
| Characiformes | Erythrinidae | Hoplias curupira | native | Black wolf-fish | |
| Characiformes | Erythrinidae | Hoplias macrophthalmus | native | Giant trahira | |
| Characiformes | Erythrinidae | Hoplias malabaricus | native | Trahira | |
| Siluriformes | Callichthyidae | Hoplosternum littorale | native | Atipa | |
| Characiformes | Cynodontidae | Hydrolycus armatus | native | ||
| Characiformes | Cynodontidae | Hydrolycus tatauaia | native | ||
| Siluriformes | Loricariidae | Hypancistrus margaritatus | native | ||
| Characiformes | Characidae | Hyphessobrycon catableptus | native | ||
| Characiformes | Characidae | Hyphessobrycon eos | native | Dawn tetra | |
| Characiformes | Characidae | Hyphessobrycon minimus | native | ||
| Characiformes | Characidae | Hyphessobrycon minor | native | ||
| Characiformes | Characidae | Hyphessobrycon rosaceus | native | Rosy tetra | |
| Pleuronectiformes | Achiridae | Hypoclinemus mentalis | native | ||
| Characiformes | Anostomidae | Hypomasticus megalepis | native | ||
| Siluriformes | Pimelodidae | Hypophthalmus edentatus | native | Highwaterman catfish | Highwater |
| Gymnotiformes | Hypopomidae | Hypopomus artedi | native | ||
| Siluriformes | Loricariidae | Hypoptopoma guianense | native | ||
| Beloniformes | Hemiramphidae | Hyporhamphus unifasciatus | native | Common halfbeak | |
| Siluriformes | Loricariidae | Hypostomus hemiurus | native | ||
| Siluriformes | Loricariidae | Hypostomus macushi | native | ||
| Siluriformes | Loricariidae | Hypostomus plecostomus | native | Suckermouth catfish | Sea hasar |
| Siluriformes | Loricariidae | Hypostomus taphorni | native | ||
| Siluriformes | Loricariidae | Hypostomus watwata | native | Armored catfish | |
| Characiformes | Iguanodectidae | Iguanodectes spilurus | native | ||
| Siluriformes | Trichomycteridae | Ituglanis gracilior | native | ||
| Characiformes | Characidae | Jupiaba abramoides | native | ||
| Characiformes | Characidae | Jupiaba essequibensis | native | ||
| Characiformes | Characidae | Jupiaba mucronata | native | ||
| Characiformes | Characidae | Jupiaba pinnata | native | ||
| Characiformes | Characidae | Jupiaba polylepis | native | ||
| Characiformes | Characidae | Jupiaba potaroensis | native | ||
| Cichliformes | Cichlidae | Krobia guianensis | native | Krobia | |
| Cichliformes | Cichlidae | Krobia petitella | native | ||
| Cyprinodontiformes | Rivulidae | Laimosemion agilae | native | ||
| Cyprinodontiformes | Rivulidae | Laimosemion breviceps | endemic | ||
| Cyprinodontiformes | Rivulidae | Laimosemion frenatus | native | ||
| Cyprinodontiformes | Rivulidae | Laimosemion mabura | endemic | ||
| Cyprinodontiformes | Rivulidae | Laimosemion mahdiaensis | native | ||
| Cyprinodontiformes | Rivulidae | Laimosemion paryagi | native | Paryag's killifish | Paryag's killifish |
| Cyprinodontiformes | Rivulidae | Laimosemion torrenticola | native | ||
| Siluriformes | Loricariidae | Lasiancistrus schomburgkii | native | ||
| Characiformes | Lebiasinidae | Lebiasina ardilai | endemic | ||
| Siluriformes | Pimelodidae | Leiarius arekaima | native | ||
| Siluriformes | Pimelodidae | Leiarius pictus | native | ||
| Characiformes | Anostomidae | Leporinus alternus | native | ||
| Characiformes | Anostomidae | Leporinus arcus | native | Lipstick leporinus | |
| Characiformes | Anostomidae | Leporinus desmotes | native | ||
| Characiformes | Anostomidae | Leporinus friderici | native | Threespot leporinus | |
| Characiformes | Anostomidae | Leporinus granti | native | ||
| Characiformes | Anostomidae | Leporinus maculatus | native | Spotted leporinus | |
| Characiformes | Anostomidae | Leporinus nigrotaeniatus | native | Halfline leporinus | |
| Characiformes | Anostomidae | Leporinus paralternus | native | ||
| Characiformes | Anostomidae | Leporinus pellegrinii | native | ||
| Siluriformes | Doradidae | Leptodoras hasemani | native | ||
| Siluriformes | Doradidae | Leptodoras linnelli | native | ||
| Siluriformes | Heptapteridae | Leptorhamdia essequibensis | native | ||
| Siluriformes | Loricariidae | Limatulichthys griseus | native | ||
| Siluriformes | Loricariidae | Lithogenes villosus | native | ||
| Siluriformes | Loricariidae | Lithoxus lithoides | native | ||
| Siluriformes | Loricariidae | Loricaria cataphracta | native | ||
| Siluriformes | Loricariidae | Loricariichthys brunneus | native | ||
| Siluriformes | Loricariidae | Loricariichthys microdon | native | ||
| Clupeiformes | Engraulidae | Lycengraulis batesii | native | Bates' sabretooth anchovy | Anchovy |
| Clupeiformes | Engraulidae | Lycengraulis grossidens | native | Atlantic sabretooth anchovy | Anchovy |
| Characiformes | Characidae | Makunaima guianensis | native | ||
| Cichliformes | Cichlidae | Mazarunia charadrica | native | ||
| Cichliformes | Cichlidae | Mazarunia mazarunii | native | ||
| Cichliformes | Cichlidae | Mazarunia pala | native | ||
| Siluriformes | Callichthyidae | Megalechis picta | native | Spotted hoplo | |
| Siluriformes | Callichthyidae | Megalechis thoracata | native | ||
| Siluriformes | Pimelodidae | Megalonema amaxanthum | native | ||
| Siluriformes | Pimelodidae | Megalonema platycephalum | native | ||
| Characiformes | Crenuchidae | Melanocharacidium blennioides | native | ||
| Cichliformes | Cichlidae | Mesonauta guyanae | native | ||
| Characiformes | Serrasalmidae | Metynnis altidorsalis | native | ||
| Characiformes | Serrasalmidae | Metynnis hypsauchen | native | Silver dollar | |
| Siluriformes | Pseudopimelodidae | Microglanis poecilus | native | Dwarf marbled catfish | |
| Siluriformes | Pseudopimelodidae | Microglanis secundus | native | ||
| Syngnathiformes | Syngnathidae | Microphis lineatus | native | Opossum pipefish | |
| Characiformes | Characidae | Microschemobrycon melanotus | native | ||
| Characiformes | Characidae | Moenkhausia browni | native | ||
| Characiformes | Characidae | Moenkhausia chrysargyrea | native | ||
| Characiformes | Characidae | Moenkhausia collettii | native | ||
| Characiformes | Characidae | Moenkhausia grandisquamis | native | ||
| Characiformes | Characidae | Moenkhausia lepidura | native | ||
| Characiformes | Characidae | Moenkhausia oligolepis | native | Glass tetra | |
| Characiformes | Characidae | Moenkhausia shideleri | native | ||
| Mugiliformes | Mugilidae | Mugil liza | native | Lebranche mullet | |
| Characiformes | Serrasalmidae | Mylesinus schomburgkii | native | ||
| Characiformes | Serrasalmidae | Myleus latus | native | ||
| Characiformes | Serrasalmidae | Myleus pacu | native | ||
| Characiformes | Serrasalmidae | Myleus setiger | native | ||
| Characiformes | Serrasalmidae | Myloplus asterias | native | ||
| Characiformes | Serrasalmidae | Myloplus rubripinnis | native | Redhook myleus | |
| Characiformes | Serrasalmidae | Myloplus torquatus | native | ||
| Siluriformes | Heptapteridae | Myoglanis potaroensis | endemic | ||
| Cichliformes | Cichlidae | Nannacara anomala | native | Goldeneye cichlid | |
| Cichliformes | Cichlidae | Nannacara bimaculata | endemic | ||
| Characiformes | Lebiasinidae | Nannostomus beckfordi | native | Golden pencilfish | |
| Characiformes | Lebiasinidae | Nannostomus digrammus | native | Twostripe pencilfish | |
| Characiformes | Lebiasinidae | Nannostomus erythrurus | native | ||
| Characiformes | Lebiasinidae | Nannostomus espei | native | Barred pencilfish | |
| Characiformes | Lebiasinidae | Nannostomus harrisoni | native | Blackstripe pencilfish | |
| Characiformes | Lebiasinidae | Nannostomus marginatus | native | ||
| Characiformes | Lebiasinidae | Nannostomus minimus | native | Least pencilfish | |
| Characiformes | Lebiasinidae | Nannostomus trifasciatus | native | Threestripe pencilfish | |
| Characiformes | Lebiasinidae | Nannostomus unifasciatus | native | Oneline pencilfish | |
| Siluriformes | Loricariidae | Nannoxyropsis ephippia | native | ||
| Siluriformes | Loricariidae | Neblinichthys brevibracchium | native | ||
| Siluriformes | Loricariidae | Neblinichthys echinasus | native | ||
| Siluriformes | Trichomycteridae | Ochmacanthus flabelliferus | native | ||
| Clupeiformes | Pristigasteridae | Odontognathus mucronatus | native | Guiana longfin herring | Herring |
| Carangiformes | Carangidae | Oligoplites palometa | native | Maracaibo leatherjacket | |
| Salmoniformes | Salmonidae | Oncorhynchus mykiss | introduced | Rainbow trout | |
| Cichliformes | Cichlidae | Oreochromis mossambicus | introduced | Mozambique tilapia | |
| Cichliformes | Cichlidae | Oreochromis niloticus | introduced | Nile tilapia | |
| Osteoglossiformes | Osteoglossidae | Osteoglossum bicirrhosum | native | Arawana | |
| Siluriformes | Doradidae | Oxydoras niger | native | Ripsaw catfish | Cuiu-cuiu |
| Eupercaria/misc | Sciaenidae | Pachypops fourcroi | native | Guyanan croaker | |
| Eupercaria/misc | Sciaenidae | Pachypops trifilis | native | ||
| Eupercaria/misc | Sciaenidae | Pachyurus schomburgkii | native | Amazon croaker | |
| Siluriformes | Loricariidae | Panaqolus claustellifer | native | ||
| Siluriformes | Loricariidae | Paralithoxus bovallii | endemic | ||
| Characiformes | Characidae | Parapristella aubynei | native | ||
| Characiformes | Parodontidae | Parodon bifasciatus | native | ||
| Characiformes | Parodontidae | Parodon guyanensis | native | ||
| Siluriformes | Loricariidae | Parotocinclus britskii | native | ||
| Siluriformes | Loricariidae | Parotocinclus collinsae | native | ||
| Siluriformes | Loricariidae | Paulasquama callis | native | ||
| Siluriformes | Loricariidae | Peckoltia braueri | native | ||
| Siluriformes | Loricariidae | Peckoltia cavatica | native | ||
| Siluriformes | Loricariidae | Peckoltia sabaji | native | ||
| Clupeiformes | Pristigasteridae | Pellona castelnaeana | native | Amazon pellona | |
| Clupeiformes | Pristigasteridae | Pellona flavipinnis | native | Yellowfin river pellona | |
| Eupercaria/misc | Sciaenidae | Petilipinnis grunniens | native | ||
| Characiformes | Anostomidae | Petulanos plicatus | native | ||
| Characiformes | Characidae | Phenacogaster carteri | native | ||
| Characiformes | Characidae | Phenacogaster megalostictus | native | ||
| Characiformes | Characidae | Phenacogaster microstictus | native | ||
| Characiformes | Characidae | Phenacogaster simulata | native | ||
| Siluriformes | Pimelodidae | Phractocephalus hemioliopterus | native | Redtail catfish | |
| Siluriformes | Doradidae | Physopyxis ananas | native | ||
| Siluriformes | Doradidae | Physopyxis lyra | native | ||
| Characiformes | Lebiasinidae | Piabucina unitaeniata | native | ||
| Characiformes | Iguanodectidae | Piabucus dentatus | native | ||
| Siluriformes | Heptapteridae | Pimelodella altipinnis | native | ||
| Siluriformes | Heptapteridae | Pimelodella cristata | native | ||
| Siluriformes | Heptapteridae | Pimelodella leptosoma | native | ||
| Siluriformes | Heptapteridae | Pimelodella macturki | native | ||
| Siluriformes | Heptapteridae | Pimelodella megalops | native | ||
| Siluriformes | Heptapteridae | Pimelodella wesselii | endemic | ||
| Siluriformes | Pimelodidae | Pimelodus blochii | native | Bloch's catfish | |
| Siluriformes | Pimelodidae | Pimelodus ornatus | native | ||
| Siluriformes | Pimelodidae | Pinirampus pirinampu | native | Flatwhiskered catfish | |
| Eupercaria/misc | Sciaenidae | Plagioscion auratus | native | Black curbinata | Rockhead basher |
| Eupercaria/misc | Sciaenidae | Plagioscion squamosissimus | native | South American silver croaker | |
| Eupercaria/misc | Sciaenidae | Plagioscion surinamensis | native | Pacora | Koebi |
| Siluriformes | Doradidae | Platydoras costatus | native | Raphael catfish | |
| Siluriformes | Doradidae | Platydoras hancockii | native | Blue-eye catfish | |
| Siluriformes | Aspredinidae | Platystacus cotylephorus | native | Banded banjo | |
| Gymnotiformes | Apteronotidae | Platyurosternarchus crypticus | native | ||
| Cyprinodontiformes | Poeciliidae | Poecilia parae | native | Para molly | |
| Cyprinodontiformes | Poeciliidae | Poecilia picta | native | Swamp guppies | |
| Cyprinodontiformes | Poeciliidae | Poecilia reticulata | native | Guppy | |
| Cyprinodontiformes | Poeciliidae | Poecilia vivipara | native | Eye spot toothcarp | |
| Characiformes | Crenuchidae | Poecilocharax bovaliorum | native | ||
| Ovalentaria/misc | Polycentridae | Polycentrus schomburgkii | native | Guyana leaffish | |
| Characiformes | Characidae | Poptella brevispina | native | ||
| Characiformes | Characidae | Poptella compressa | native | ||
| Gymnotiformes | Apteronotidae | Porotergus gymnotus | native | ||
| Beloniformes | Belonidae | Potamorrhaphis guianensis | native | ||
| Myliobatiformes | Potamotrygonidae | Potamotrygon orbignyi | native | Smooth back river stingray | |
| Characiformes | Characidae | Pristella maxillaris | native | X-ray tetra | |
| Rhinopristiformes | Pristidae | Pristis microdon | native | Largetooth sawfish | |
| Rhinopristiformes | Pristidae | Pristis pectinata | native | Smalltooth sawfish | Sawfish |
| Rhinopristiformes | Pristidae | Pristis perotteti | native | Large-tooth sawfish | Sawfish |
| Characiformes | Serrasalmidae | Pristobrycon aureus | native | ||
| Characiformes | Serrasalmidae | Pristobrycon calmoni | native | ||
| Characiformes | Serrasalmidae | Pristobrycon striolatus | native | ||
| Characiformes | Prochilodontidae | Prochilodus rubrotaeniatus | native | ||
| Characiformes | Serrasalmidae | Prosomyleus rhomboidalis | native | ||
| Characiformes | Curimatidae | Psectrogaster ciliata | native | ||
| Characiformes | Curimatidae | Psectrogaster essequibensis | native | ||
| Siluriformes | Loricariidae | Pseudacanthicus leopardus | endemic | ||
| Siluriformes | Loricariidae | Pseudancistrus barbatus | native | Bearded catfish | |
| Siluriformes | Loricariidae | Pseudancistrus guentheri | native | ||
| Siluriformes | Loricariidae | Pseudancistrus nigrescens | endemic | ||
| Characiformes | Anostomidae | Pseudanos trimaculatus | native | Threespot headstander | |
| Siluriformes | Auchenipteridae | Pseudauchenipterus nodosus | native | Cocosoda catfish | |
| Siluriformes | Pseudopimelodidae | Pseudopimelodus bufonius | native | ||
| Siluriformes | Pimelodidae | Pseudoplatystoma fasciatum | native | Barred sorubim | |
| Beloniformes | Belonidae | Pseudotylosurus microps | native | ||
| Clupeiformes | Engraulidae | Pterengraulis atherinoides | native | Wingfin anchovy | Anchovy |
| Siluriformes | Doradidae | Pterodoras granulosus | native | Granulated catfish | |
| Cichliformes | Cichlidae | Pterophyllum leopoldi | native | ||
| Cichliformes | Cichlidae | Pterophyllum scalare | native | Freshwater angelfish | |
| Characiformes | Serrasalmidae | Pygocentrus nattereri | native | Red piranha | Red pirai |
| Characiformes | Serrasalmidae | Pygopristis denticulata | native | Lobetoothed piranha | |
| Characiformes | Lebiasinidae | Pyrrhulina filamentosa | native | ||
| Characiformes | Lebiasinidae | Pyrrhulina semifasciata | native | ||
| Siluriformes | Heptapteridae | Rhamdia foina | native | ||
| Siluriformes | Heptapteridae | Rhamdia laukidi | native | ||
| Siluriformes | Heptapteridae | Rhamdia muelleri | native | ||
| Siluriformes | Heptapteridae | Rhamdia quelen | native | South American catfish | |
| Siluriformes | Heptapteridae | Rhamdia schomburgkii | native | ||
| Gymnotiformes | Rhamphichthyidae | Rhamphichthys rostratus | native | Trompet knifefish | |
| Characiformes | Cynodontidae | Rhaphiodon vulpinus | native | Biara | |
| Siluriformes | Doradidae | Rhinodoras armbrusteri | native | Dirty thicklip thornycat | |
| Clupeiformes | Dorosomatidae | Rhinosardinia amazonica | native | Amazon spinejaw sprat | |
| Clupeiformes | Dorosomatidae | Rhinosardinia bahiensis | native | Bahia sprat | |
| Eupercaria/misc | Haemulidae | Rhonciscus crocro | native | Burro grunt | |
| Siluriformes | Loricariidae | Rineloricaria fallax | native | ||
| Siluriformes | Loricariidae | Rineloricaria platyura | native | ||
| Siluriformes | Loricariidae | Rineloricaria stewarti | native | ||
| Characiformes | Characidae | Roeboides affinis | native | ||
| Characiformes | Characidae | Roeboides dientonito | native | ||
| Characiformes | Acestrorhynchidae | Roestes ogilviei | native | ||
| Cichliformes | Cichlidae | Satanoperca leucosticta | native | ||
| Siluriformes | Ariidae | Sciades couma | native | Couma sea catfish | |
| Siluriformes | Ariidae | Sciades herzbergii | native | Pemecou sea catfish | Gillbacker |
| Characiformes | Prochilodontidae | Semaprochilodus insignis | native | Kissing prochilodus | |
| Characiformes | Serrasalmidae | Serrasalmus eigenmanni | native | ||
| Characiformes | Serrasalmidae | Serrasalmus emarginatus | native | ||
| Characiformes | Serrasalmidae | Serrasalmus rhombeus | native | Redeye piranha | |
| Characiformes | Serrasalmidae | Serrasalmus stagnatilis | native | ||
| Characiformes | Crenuchidae | Skiotocharax meizon | native | ||
| Siluriformes | Pimelodidae | Sorubim elongatus | native | Slender shovelnose catfish | |
| Gymnotiformes | Hypopomidae | Steatogenys elegans | native | Barred knifefish | |
| Characiformes | Curimatidae | Steindachnerina guentheri | native | ||
| Gymnotiformes | Apteronotidae | Sternarchorhynchus freemani | native | Freeman’s tube-snouted ghost knifefish | |
| Gymnotiformes | Apteronotidae | Sternarchorhynchus oxyrhynchus | native | Oxyrhynchus tube-snouted ghost knifefish | |
| Gymnotiformes | Sternopygidae | Sternopygus macrurus | native | Longtail knifefish | |
| Beloniformes | Belonidae | Strongylura marina | native | Atlantic needlefish | |
| Siluriformes | Loricariidae | Sturisoma monopelte | native | ||
| Cichliformes | Cichlidae | Symphysodon aequifasciatus | introduced | Blue discus | |
| Synbranchiformes | Synbranchidae | Synbranchus marmoratus | native | Marbled swamp eel | |
| Siluriformes | Auchenipteridae | Tatia intermedia | native | ||
| Siluriformes | Auchenipteridae | Tatia meesi | native | ||
| Siluriformes | Auchenipteridae | Tatia reticulata | native | ||
| Siluriformes | Doradidae | Tenellus leporhinus | native | ||
| Siluriformes | Doradidae | Tenellus trimaculatus | native | ||
| Characiformes | Characidae | Tetragonopterus argenteus | native | ||
| Characiformes | Characidae | Tetragonopterus chalceus | native | ||
| Cyprinodontiformes | Poeciliidae | Tomeurus gracilis | native | Bottle toothcarp | |
| Siluriformes | Auchenipteridae | Trachelyichthys decaradiatus | native | ||
| Siluriformes | Auchenipteridae | Trachycorystes trachycorystes | native | Black catfish | |
| Siluriformes | Doradidae | Trachydoras brevis | native | ||
| Siluriformes | Doradidae | Trachydoras gepharti | native | ||
| Siluriformes | Doradidae | Trachydoras microstomus | native | ||
| Siluriformes | Trichomycteridae | Trichomycterus conradi | native | ||
| Siluriformes | Trichomycteridae | Trichomycterus guianense | native | ||
| Characiformes | Triportheidae | Triportheus brachipomus | native | ||
| Characiformes | Triportheidae | Triportheus elongatus | native | Elongate hatchetfish | |
| Characiformes | Triportheidae | Triportheus rotundatus | native | ||
| Siluriformes | Auchenipteridae | Tympanopleura piperata | native | ||
| Siluriformes | Trichomycteridae | Vandellia beccarii | native | ||
| Siluriformes | Trichomycteridae | Vandellia sanguinea | native | ||
| Siluriformes | Pimelodidae | Zungaro zungaro | native | Gilded catfish |