Abramis Cuvier, 1816 (taxonomy source)
Abramis ballerus (Linnaeus, 1758) accepted as Ballerus ballerus (Linnaeus, 1758) (basis of record)
Abramis bjoerkna (Linnaeus, 1758) accepted as Blicca bjoerkna (Linnaeus, 1758) (basis of record)
Abramis brama (Linnaeus, 1758) (basis of record)
Abramis sapa (Pallas, 1814) accepted as Ballerus sapa (Pallas, 1814) (basis of record)
Abudefduf Forsskål, 1775 (taxonomy source)
Acanthochaenus Gill, 1884 (taxonomy source)
Acanthocybium Gill, 1862 (taxonomy source)
Acantholabrus Valenciennes, 1839 (taxonomy source)
Acanthonus Günther, 1878 (taxonomy source)
Acanthostracion Bleeker, 1865 (taxonomy source)
Acanthuridae Bonaparte, 1835 (additional source)
Acanthuroidei (basis of record)
Acanthurus Forsskål, 1775 (taxonomy source)
Acipenser Linnaeus, 1758 (taxonomy source)
Acipenser baerii Brandt, 1869 (basis of record)
Acipenser gueldenstaedtii Brandt & Ratzeburg, 1833 (additional source)
Acipenser oxyrinchus Mitchill, 1815 (basis of record)
Acipenser sturio Linnaeus, 1758 (additional source)
Acipenseridae Bonaparte, 1831 (additional source)
Acipenseriformes (basis of record)
Actinopterygii (basis of record)
Aetomylaeus Garman, 1908 (taxonomy source)
Agonidae Swainson, 1839 (additional source)
Agonus Bloch & Schneider, 1801 (taxonomy source)
Agonus cataphractus (Linnaeus, 1758) (additional source)
Ahliesaurus Bertelsen, Krefft & Marshall, 1976 (taxonomy source)
Aidablennius Whitley, 1947 (taxonomy source)
Alburnoides Jeitteles, 1861 (taxonomy source)
Alburnoides bipunctatus (Bloch, 1782) (basis of record)
Alburnus Rafinesque, 1820 (taxonomy source)
Alburnus alburnus (Linnaeus, 1758) (basis of record)
Aldrovandia Goode & Bean, 1896 (taxonomy source)
Alectis Rafinesque, 1815 (taxonomy source)
Alepes Swainson, 1839 (taxonomy source)
Alepisauridae Swainson, 1839 (additional source)
Alepisaurus Lowe, 1833 (taxonomy source)
Alepocephalidae Bonaparte, 1846 (additional source)
Alepocephalus Risso, 1820 (taxonomy source)
Allocyttus McCulloch, 1914 (taxonomy source)
Alopias Rafinesque, 1810 (taxonomy source)
Alopiidae Bonaparte, 1835 (additional source)
Alosa Linck, 1790 (taxonomy source)
Aluterus Cloquet, 1816 (taxonomy source)
Amblyraja Malm, 1877 (taxonomy source)
Amblyraja radiata (Donovan, 1808) (additional source)
Ameiurus Rafinesque, 1820 (taxonomy source)
Ameiurus melas (Rafinesque, 1820) (basis of record)
Ameiurus melas (Rafinesque, 1820) (source of synonymy)
Ammodytes Linnaeus, 1758 (taxonomy source)
Ammodytes lancea Cuvier, 1829 accepted as Ammodytes tobianus Linnaeus, 1758 (additional source)
Ammodytes marinus Raitt, 1934 (additional source)
Ammodytes tobianus Linnaeus, 1758 (additional source)
Ammodytidae Bonaparte, 1835 (additional source)
Anarchias Jordan & Starks, 1906 (taxonomy source)
Anarhichadidae Bonaparte, 1835 (additional source)
Anarhichas Linnaeus, 1758 (taxonomy source)
Anarhichas denticulatus Krøyer, 1845 (additional source)
Anarhichas lupus Linnaeus, 1758 (additional source)
Anguilla Schrank, 1798 (taxonomy source)
Anguillidae Rafinesque, 1810 (additional source)
Anguilliformes (basis of record)
Anisarchus Gill, 1864 (taxonomy source)
Anoplogaster Günther, 1859 (taxonomy source)
Anotopteridae Zugmayer, 1911 (additional source)
Anotopterus Zugmayer, 1911 (taxonomy source)
Antennariidae Jarocki, 1822 (additional source)
Antennarius Daudin, 1816 (taxonomy source)
Antennatus Schultz, 1957 (taxonomy source)
Anthias Bloch, 1792 (taxonomy source)
Anthiinae Poey, 1861 accepted as Anthiadinae Poey, 1861 (basis of record)
Antigonia Lowe, 1843 (taxonomy source)
Antimora Günther, 1878 (taxonomy source)
Antonogadus Wheeler, 1969 accepted as Gaidropsarus Rafinesque, 1810 (basis of record)
Aphanius Nardo, 1827 (taxonomy source)
Aphanopodinae Gill, 1863 (basis of record)
Aphanopus Lowe, 1839 (taxonomy source)
Aphia Risso, 1827 (taxonomy source)
Aphia minuta (Risso, 1810) (additional source)
Aphyonidae Jordan & Evermann, 1898 (additional source)
Aphyonus Günther, 1878 (taxonomy source)
Apletodon Briggs, 1955 (taxonomy source)
Apogon Lacepède, 1801 (taxonomy source)
Apogonichthyoides Smith, 1949 (taxonomy source)
Apogonidae Günther, 1859 (additional source)
Apristurus Garman, 1913 (taxonomy source)
Apterichtus Duméril, 1806 (taxonomy source)
Arctogadus Dryagin, 1932 (taxonomy source)
Arctozenus Gill, 1864 (taxonomy source)
Argentina Linnaeus, 1758 (taxonomy source)
Argentinidae Bonaparte, 1846 (additional source)
Argyripnus Gilbert & Cramer, 1897 (taxonomy source)
Argyropelecus Cocco, 1829 (taxonomy source)
Argyrosomus De la Pylaie, 1835 (taxonomy source)
Argyrosomus regius (Asso, 1801) (additional source)
Ariidae Bleeker, 1858 (basis of record)
Ariosoma Swainson, 1838 (taxonomy source)
Aristichthys Oshima, 1919 accepted as Hypophthalmichthys Bleeker, 1860 (basis of record)
Aristichthys nobilis (Richardson, 1845) accepted as Hypophthalmichthys nobilis (Richardson, 1845) (basis of record)
Aristichthys nobilis (Richardson, 1845) accepted as Hypophthalmichthys nobilis (Richardson, 1845) (source of synonymy)

English spotted guitarfish for Rhinobatos punctifer Compagno & Randall, 1987

 Synonymy

 for Hippocampus guttulatus Cuvier, 1829

Was first synonymised with Hippocampus ramulosus, now again valid species [details]