• Abyssocottus elochini Taliev, 1955: Unknown or undetermined
• Abyssocottus fuscus Bogdanov, 2013: Unknown or undetermined
• Abyssocottus gibbosus Berg, 1906: Unknown or undetermined
• Abyssocottus godlewskii: Unknown or undetermined
• Abyssocottus korotneffi Berg, 1906: Unknown or undetermined
• Abyssocottus pumilus Bogdanov, 2013: Unknown or undetermined
• Acentrophryne dolichonema Pietsch & Shimazaki, 2005: Unknown or undetermined
• Acentrophryne longidens Regan, 1926: Unknown or undetermined
• Acrochordus arafurae McDowell, 1979: Unknown or undetermined
• Acrochordus granulatus (Schneider, 1799): Unknown or undetermined
• Acrochordus javanicus Hornstedt, 1787: Unknown or undetermined
• Acroteriobatus andysabini Weigmann, Ebert & Séret, 2021: Unknown or undetermined
• Acroteriobatus annulatus (Müller & Henle, 1841): Unknown or undetermined
• Acroteriobatus blochii (Müller & Henle, 1841): Unknown or undetermined
• Acroteriobatus leucospilus (Norman, 1926): Unknown or undetermined
• Acroteriobatus ocellatus (Norman, 1926): Unknown or undetermined
• Acroteriobatus omanensis Last, Henderson & Naylor, 2016: Unknown or undetermined
• Acroteriobatus salalah (Randall & Compagno, 1995): Unknown or undetermined
• Acroteriobatus stehmanni Weigmann, Ebert & Séret, 2021: Unknown or undetermined
• Acroteriobatus variegatus (Nair & Lal Mohan, 1973): Unknown or undetermined
• Acroteriobatus zanzibarensis (Norman, 1926): Unknown or undetermined
• Actinemys marmorata (Baird & Girard, 1852): Unknown or undetermined
• Aculeola nigra de Buen, 1959: Unknown or undetermined
• Aenigmachanna gollum Britz, Anoop, Dahanukar & Raghavan, 2019: Unknown or undetermined
• Aenigmachanna mahabali Kumar, Basheer & Ravi, 2019: Unknown or undetermined
• Aetobatus flagellum (Bloch & Schneider, 1801): Unknown or undetermined
• Aetobatus laticeps Gill, 1865: Unknown or undetermined
• Aetobatus narutobiei White, Furumitsu & Yamaguchi, 2013: Unknown or undetermined
• Aetobatus ocellatus (Kuhl, 1823): Unknown or undetermined
• Aetomylaeus asperrimus (Gilbert, 1898): Unknown or undetermined
• Aetomylaeus bovinus (Geoffroy Saint-Hilaire, 1817): Unknown or undetermined
• Aetomylaeus caeruleofasciatus White, Last & Baje, 2015: Unknown or undetermined
• Aetomylaeus maculatus (Gray, 1834): Unknown or undetermined
• Aetomylaeus milvus (Müller & Henle, 1841): Unknown or undetermined
• Aetomylaeus nichofii (Bloch & Schneider, 1801): Unknown or undetermined
• Aetomylaeus vespertilio (Bleeker, 1852): Unknown or undetermined
• Agama agama (Linnaeus, 1758): Unknown or undetermined
• Agkistrodon piscivorus Lacépède, 1789: Unknown or undetermined
• Ahaetulla mycterizans (Linnaeus, 1758): Unknown or undetermined
• Aipysurus apraefrontalis Smith, 1926: Unknown or undetermined
• Aipysurus duboisii Bavay, 1869: Unknown or undetermined
• Aipysurus eydouxi Gray, 1849: Unknown or undetermined
• Aipysurus foliosquama Smith, 1926: Unknown or undetermined
• Aipysurus fuscus Tschudi, 1837: Unknown or undetermined
• Aipysurus laevis Lacépède, 1804: Unknown or undetermined
• Aipysurus mosaicus Sanders, Rasmussen, Elmberg, Mumpuni, Guinea, Blias, Lee & Fry, 2012: Unknown or undetermined
• Aipysurus tenuis Lönnberg & Andersson, 1913: Unknown or undetermined
• Akheilos suwartanai White, Fahmi & Weigmann, 2019: Unknown or undetermined
• Alertichthys blacki Moreland, 1960: Unknown or undetermined
• Allenichthys glauerti (Whitley, 1944): Unknown or undetermined
• Alligator mississippiensis (Daudin, 1802): Unknown or undetermined
• Allomicrodesmus dorotheae Schultz, 1966: Unknown or undetermined
• Alopias pelagicus Nakamura, 1935: Unknown or undetermined
• Alopias superciliosus Lowe, 1841: Unknown or undetermined
• Alopias vulpinus (Bonnaterre, 1788): Unknown or undetermined
• Alosa agone (Scopoli, 1786): Unknown or undetermined
• Alosa alabamae Jordan & Evermann, 1896: Unknown or undetermined
• Alosa algeriensis Regan, 1916: Unknown or undetermined
• Alosa braschnikowi (Borodin, 1904): Unknown or undetermined
• Alosa caspia (Eichwald, 1838): Unknown or undetermined
• Alosa chrysochloris (Rafinesque, 1820): Unknown or undetermined
• Alosa curensis (Suvorov, 1907): Unknown or undetermined
• Alosa fallax (Lacepède, 1803): Unknown or undetermined
• Alosa immaculata Bennett, 1835: Unknown or undetermined
• Alosa kessleri (Grimm, 1887): Unknown or undetermined
• Alosa killarnensis Regan, 1916: Unknown or undetermined
• Alosa macedonica (Vinciguerra, 1921): Unknown or undetermined
• Alosa maeotica (Grimm, 1901): Unknown or undetermined
• Alosa sapidissima (Wilson, 1811): Unknown or undetermined
• Alosa saposchnikowii (Grimm, 1887): Unknown or undetermined
• Alosa sphaerocephala (Berg, 1913): Unknown or undetermined
• Alosa suworowi (Berg, 1913): Unknown or undetermined
• Alosa tanaica (Grimm, 1901): Unknown or undetermined
• Alosa vistonica Economidis & Sinis, 1986: Unknown or undetermined
• Alosa volgensis (Berg, 1913): Unknown or undetermined
• Amarsipus carlsbergi Haedrich, 1969: Unknown or undetermined
• Amblygaster clupeoides Bleeker, 1849: Unknown or undetermined
• Amblygaster indiana Mary, Balasubramanian, Selvaraju & Shiny, 2017: Unknown or undetermined
• Amblygaster leiogaster (Valenciennes, 1847): Unknown or undetermined
• Amblygaster sirm (Walbaum, 1792): Unknown or undetermined
• Amblyraja doellojuradoi (Pozzi, 1935): Unknown or undetermined
• Amblyraja frerichsi (Krefft, 1968): Unknown or undetermined
• Amblyraja georgiana (Norman, 1938): Unknown or undetermined
• Amblyraja hyperborea (Collett, 1879): Unknown or undetermined
• Amblyraja jenseni (Bigelow & Schroeder, 1950): Unknown or undetermined
• Amblyraja radiata (Donovan, 1808): Unknown or undetermined
• Amblyraja reversa (Lloyd, 1906): Unknown or undetermined
• Amblyraja taaf (Meisner, 1987): Unknown or undetermined
• Amblyrhynchus cristatus Bell, 1825: Unknown or undetermined
• Ambystoma altamirani Dugès, 189: Unknown or undetermined
• Ambystoma macrodactylum Baird, 1849: Unknown or undetermined
• Ambystoma opacum (Gravenhorst, 1807): Unknown or undetermined
• Ambystoma tigrinum (Green, 1825): Unknown or undetermined
• Amietia angolensis (Bocage, 1866): Unknown or undetermined
• Amietia fuscigula (Duméril & Bibron, 1841): Unknown or undetermined
• Amnirana albolabris (Hallowell, 1856): Unknown or undetermined
• Amnirana occidentalis (Perret, 1960): Unknown or undetermined
• Amolops hainanensis (Boulenger, 1900): Unknown or undetermined
• Amphiesma stolatum (Linnaeus, 1758): Unknown or undetermined
• Amphiuma tridactylum Cuvier, 1827: Unknown or undetermined