n = 82
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Leptocephalus acuticeps | Regan, 1916 | Avocettina acuticeps | Nemichthyidae | Southern fintail snipe eel |
| Leptocephalus affinis | Facciolà, 1883 | Ariosoma balearicum | Congridae | Bandtooth conger |
| Leptocephalus andreae | Schmidt, 1912 | Nemichthys scolopaceus | Nemichthyidae | Slender snipe eel |
| Leptocephalus anguilloides | Schmidt, 1916 | Derichthys serpentinus | Derichthyidae | Narrownecked oceanic eel |
| Leptocephalus arabicus | D'Ancona, 1928 | Gavialiceps arabicus | Muraenesocidae | |
| Leptocephalus bellotii | D'Ancona, 1928 | Leptocephalus bellottii | Nettastomatidae | |
| Leptocephalus bellottii | D'Ancona, 1928 | Leptocephalus bellottii | Nettastomatidae | |
| Leptocephalus brevirostris | Kaup, 1856 | Anguilla anguilla | Anguillidae | European eel |
| Leptocephalus canaricus | Lea, 1913 | Nemichthys scolopaceus | Nemichthyidae | Slender snipe eel |
| Leptocephalus candidissimus | Costa, 1832 | Conger conger | Congridae | European conger |
| Leptocephalus capensis | Kaup, 1856 | Gnathophis capensis | Congridae | Southern conger |
| Leptocephalus caudomaculatus | Eigenmann & Kennedy, 1902 | Echiophis intertinctus | Ophichthidae | Spotted spoon-nose eel |
| Leptocephalus conger | (Linnaeus, 1758) | Conger conger | Congridae | European conger |
| Leptocephalus congroides | D'Ancona, 1928 | Heteroconger congroides | Congridae | |
| Leptocephalus cotroneii | D'Ancona, 1928 | Gorgasia cotroneii | Congridae | |
| Leptocephalus crenatus | Strömman, 1896 | Ahlia egmontis | Ophichthidae | Key worm eel |
| Leptocephalus curvirostris | Strömman, 1896 | Nemichthys curvirostris | Nemichthyidae | Pale threadtail snipe eel |
| Leptocephalus diptychus | Eigenmann & Kennedy, 1901 | Moringua edwardsi | Moringuidae | Spaghetti eel |
| Leptocephalus dolichorhynchus | Lea, 1913 | Synaphobranchus dolichorhynchus | Synaphobranchidae | |
| Leptocephalus echeloides | D'Ancona, 1928 | Ophichthus echeloides | Ophichthidae | |
| Leptocephalus eckmani | Strömman, 1896 | Ariosoma balearicum | Congridae | Bandtooth conger |
| Leptocephalus ectenurus | Jordan & Richardson, 1909 | Rhynchoconger ectenurus | Congridae | |
| Leptocephalus ekmani | Strömman, 1896 | Ariosoma balearicum | Congridae | Bandtooth conger |
| Leptocephalus erebennus | Jordan & Snyder, 1901 | Conger erebennus | Congridae | |
| Leptocephalus euryurus | Lea, 1913 | Anarchias euryurus | Muraenidae | |
| Leptocephalus forsstromi | Strömman, 1896 | Gymnothorax vicinus | Muraenidae | Purplemouth moray |
| Leptocephalus forstromi | Strömman, 1896 | Gymnothorax vicinus | Muraenidae | Purplemouth moray |
| Leptocephalus giganteus | Castle, 1959 | Leptocephalus giganteus | Notacanthidae | Giant leptocephalus |
| Leptocephalus gilberti | Eigenmann & Kennedy, 1902 | Bascanichthys bascanium | Ophichthidae | Sooty eel |
| Leptocephalus grassii | Eigenmann & Kennedy, 1902 | Anguilla rostrata | Anguillidae | American eel |
| Leptocephalus gussoni | Cocco, 1829 | Conger conger | Congridae | European conger |
| Leptocephalus hexastigma | Regan, 1916 | Ahlia egmontis | Ophichthidae | Key worm eel |
| Leptocephalus humilis | Strömman, 1896 | Ahlia egmontis | Ophichthidae | Key worm eel |
| Leptocephalus hyoproroides | Strömman, 1896 | Kaupichthys hyoproroides | Chlopsidae | False moray |
| Leptocephalus inaequalis | Facciolà, 1883 | Conger conger | Congridae | European conger |
| Leptocephalus inferomaculatus | Blache, 1977 | Gorgasia inferomaculata | Congridae | |
| Leptocephalus ingolfianus | Schmidt, 1912 | Nessorhamphus ingolfianus | Derichthyidae | Duckbill oceanic eel |
| Leptocephalus inornatus | Facciolà, 1883 | Ariosoma balearicum | Congridae | Bandtooth conger |
| Leptocephalus lanceolatoides | Schmidt, 1916 | Serrivomer lanceolatoides | Serrivomeridae | Bronze sawtooth eel |
| Leptocephalus lanceolatus | Strömman, 1896 | Serrivomer beanii | Serrivomeridae | Stout sawpalate |
| Leptocephalus lateromaculatus | D'Ancona, 1928 | Saurenchelys lateromaculata | Nettastomatidae | |
| Leptocephalus latissimus | Schmidt, 1912 | Saccopharynx ampullaceus | Saccopharyngidae | Gulper eel |
| Leptocephalus lineatus | Bonnaterre, 1788 | Conger conger | Congridae | European conger |
| Leptocephalus longirostris | Kaup, 1856 | Nettastoma melanura | Nettastomatidae | Blackfin sorcerer |
| Leptocephalus maculatus | Della Croce & Castle, 1966 | Heteroconger hassi | Congridae | Spotted garden-eel |
| Leptocephalus marginatus | Kaup, 1856 | Ariosoma balearicum | Congridae | Bandtooth conger |
| Leptocephalus mauritianum | Pappenheim, 1914 | Ariosoma mauritianum | Congridae | Blunt-tooth conger |
| Leptocephalus mauritianus | Pappenheim, 1914 | Ariosoma mauritianum | Congridae | Blunt-tooth conger |
| Leptocephalus microphthalmus | Beebe & Tee-Van, 1928 | Ariosoma balearicum | Congridae | Bandtooth conger |
| Leptocephalus mollis | Fowler, 1944 | Myrophis punctatus | Ophichthidae | Speckled worm-eel |
| Leptocephalus monganius | Phillipps, 1932 | Genus Species | New species | |
| Leptocephalus mongolicus | Basilewsky, 1855 | Chanodichthys mongolicus | Xenocyprididae | Mongolian redfin |
| Leptocephalus morrisii | Gmelin, 1789 | Conger conger | Congridae | European conger |
| Leptocephalus mucronatus | Eigenmann & Kennedy, 1902 | Ophichthus cruentifer | Ophichthidae | Margined snake eel |
| Leptocephalus nystromi | Jordan & Snyder, 1901 | Gnathophis nystromi | Congridae | |
| Leptocephalus ophichthoides | D'Ancona, 1928 | Leptocephalus ophichthoides | Ophichthidae | |
| Leptocephalus orbignyanus | (Valenciennes, 1837) | Conger orbignianus | Congridae | Argentine conger |
| Leptocephalus oxycephalus | Pappenheim, 1914 | Avocettina infans | Nemichthyidae | Avocet snipe eel |
| Leptocephalus oxyrhynchus | Bellotti, 1883 | Facciolella oxyrhynchus | Nettastomatidae | Facciola's sorcerer |
| Leptocephalus pellucidus | (Couch, 1832) | Conger conger | Congridae | European conger |
| Leptocephalus polymerus | Lea, 1913 | Nemichthys curvirostris | Nemichthyidae | Pale threadtail snipe eel |
| Leptocephalus proboscideus | Lea, 1913 | Dysommina proboscideus | Synaphobranchidae | |
| Leptocephalus pseudolatissimus | Bertin, 1936 | Eurypharynx pelecanoides | Eurypharyngidae | Pelican eel |
| Leptocephalus pseudomicrocephalus | Van Utrecht, 1988 | Genus Species | New species | |
| Leptocephalus retrotinctus | Jordan & Snyder, 1901 | Bathycongrus retrotinctus | Congridae | Blackedge conger |
| Leptocephalus rex | Eigenmann & Kennedy, 1902 | Ariosoma balearicum | Congridae | Bandtooth conger |
| Leptocephalus sanzoi | D'Ancona, 1928 | Ariosoma sanzoi | Congridae | |
| Leptocephalus saurencheloides | D'Ancona, 1928 | Facciolella saurencheloides | Nettastomatidae | |
| Leptocephalus scheelei | Strömman, 1896 | Ariosoma scheelei | Congridae | Tropical conger |
| Leptocephalus similis | Lea, 1913 | Anarchias similis | Muraenidae | Pygmy moray |
| Leptocephalus spallanzani | Risso, 1810 | Conger conger | Congridae | European conger |
| Leptocephalus splendens | Lea, 1913 | Pseudophichthys splendens | Congridae | Purplemouthed conger |
| Leptocephalus stenops | Kaup, 1856 | Conger conger | Congridae | European conger |
| Leptocephalus stylurus | Lea, 1913 | Saurenchelys stylura | Nettastomatidae | Pillar wire eel |
| Leptocephalus taenia | Kaup, 1856 | Ariosoma balearicum | Congridae | Bandtooth conger |
| Leptocephalus telescopicus | Schmidt, 1913 | Dysomma brevirostre | Synaphobranchidae | Pignosed arrowtooth eel |
| Leptocephalus trilineatus | Castle, 1964 | Bathycongrus trilineatus | Congridae | |
| Leptocephalus tuberculatus | Castle, 1965 | Neoconger tuberculatus | Moringuidae | Swollengut worm eel |
| Leptocephalus undulatus | Strömman, 1896 | Myrichthys breviceps | Ophichthidae | Sharptail eel |
| Leptocephalus urosema | Lea, 1913 | Nettastoma melanura | Nettastomatidae | Blackfin sorcerer |
| Leptocephalus vitreus | Kölliker, 1853 | Conger conger | Congridae | European conger |
| Leptocephalus wilsoni | (Bloch & Schneider, 1801) | Conger wilsoni | Congridae | Cape conger |