Acanthuridae Bonaparte, 1835 (taxonomy source)
Acanthuroidei accepted as Acanthuriformes (taxonomy source)
Achiropsettidae Heemstra, 1990 (taxonomy source)
Acropomatidae Gill, 1893 (taxonomy source)
Actinopteri (basis of record)
Adrianichthyidae Weber, 1913 (taxonomy source)
Agonidae Swainson, 1839 (taxonomy source)
Agoninae Swainson, 1839 (taxonomy source)
Albulidae Bleeker, 1849 (taxonomy source)
Albuliformes (taxonomy source)
Albulinae Bleeker, 1849 (taxonomy source)
Alepisauridae Swainson, 1839 (taxonomy source)
Alepocephalidae Bonaparte, 1846 (taxonomy source)
Alopiidae Bonaparte, 1835 (taxonomy source)
Amblyopinae Günther, 1861 (taxonomy source)
Ammodytidae Bonaparte, 1835 (taxonomy source)
Anabantoidei accepted as Anabantiformes (taxonomy source)
Anablepidae Bonaparte, 1831 (taxonomy source)
Anablepinae Bonaparte, 1831 (taxonomy source)
Anacanthobatidae von Bonde & Swart, 1923 (taxonomy source)
Anarhichadidae Bonaparte, 1835 (taxonomy source)
Ancistrinae Kner, 1854 (taxonomy source)
Anguillidae Rafinesque, 1810 (taxonomy source)
Anguilliformes (taxonomy source)
Anoplagoninae Gill, 1861 (taxonomy source)
Anoplogastridae Gill, 1893 (taxonomy source)
Anoplopomatidae Jordan & Gilbert, 1883 (taxonomy source)
Anoplopomatoidei accepted as Anoplopomatidae Jordan & Gilbert, 1883 (taxonomy source)
Anotopteridae Zugmayer, 1911 (taxonomy source)
Antennariidae Jarocki, 1822 (taxonomy source)
Anthiinae Poey, 1861 accepted as Anthiadinae Poey, 1861 (taxonomy source)
Aphanopodinae Gill, 1863 (taxonomy source)
Aphyonidae Jordan & Evermann, 1898 (taxonomy source)
Aploactinidae Jordan & Starks, 1904 (taxonomy source)
Aplocheilidae Bleeker, 1859 (taxonomy source)
Apogonidae Günther, 1859 (taxonomy source)
Apogoninae Günther, 1859 (taxonomy source)
Aptocyclinae Ueno, 1970 accepted as Cyclopteridae Bonaparte, 1831 (source of synonymy)
Argentinidae Bonaparte, 1846 (taxonomy source)
Arhynchobatidae Fowler, 1934 (taxonomy source)
Ariommatidae Haedrich, 1967 (taxonomy source)
Artedidraconidae Andriashev, 1967 (taxonomy source)
Astronesthinae Günther, 1864 (taxonomy source)
Ateleopodidae Bonaparte, 1850 (taxonomy source)
Ateleopodiformes (taxonomy source)
Atherinidae Risso, 1827 (taxonomy source)
Atheriniformes (taxonomy source)
Atherininae Risso, 1827 (taxonomy source)
Atherinomorinae Dyer & Chernoff, 1996 (taxonomy source)
Atherinopsidae Fitzinger, 1873 (taxonomy source)
Aulopiformes (taxonomy source)
Bagridae Bleeker, 1858 (taxonomy source)
Balistidae Rafinesque, 1810 (taxonomy source)
Balitoridae Swainson, 1839 (taxonomy source)
Barbinae Bleeker, 1859 (taxonomy source)
Barbourisiidae Parr, 1945 (taxonomy source)
Bathyagoninae Lindberg, 1971 (taxonomy source)
Bathyclupeidae Gill, 1896 (taxonomy source)
Bathydraconidae Regan, 1913 (taxonomy source)
Bathydraconinae Regan, 1913 (taxonomy source)
Bathygadinae Jordan & Evermann, 1898 (taxonomy source)
Bathylagidae Gill, 1884 (taxonomy source)
Bathylutichthyidae Balushkin & Voskoboynikova, 1990 (taxonomy source)
Bathymasteridae Jordan & Gilbert, 1883 (taxonomy source)
Bathymyrinae Böhlke, 1949 (taxonomy source)
Bathysauridae Fowler, 1944 (taxonomy source)
Bathysauroididae Sato & Nakabo, 2002 (taxonomy source)
Bathysauropsidae Sato & Nakabo, 2002 accepted as Ipnopidae Gill, 1884 (taxonomy source)
Batrachoididae Jordan, 1896 (taxonomy source)
Batrachoidiformes (taxonomy source)
Belonidae Bonaparte, 1835 (taxonomy source)
Beloniformes (taxonomy source)
Bembridae Kaup, 1873 (taxonomy source)
Bembropinae Regan, 1913 accepted as Bembropidae Regan, 1913 (taxonomy source)
Berycidae Lowe, 1839 (taxonomy source)
Beryciformes (taxonomy source)
Blenniidae Rafinesque, 1810 (taxonomy source)
Blenniinae Rafinesque, 1810 (taxonomy source)
Blennioidei accepted as Blenniiformes (taxonomy source)
Bothidae Smitt, 1892 (taxonomy source)
Brachypleurinae Chabanaud, 1937 accepted as Citharidae de Buen, 1935 (source of synonymy)
Bramidae Bonaparte, 1831 (taxonomy source)
Bregmacerotidae Gill, 1872 (taxonomy source)
Brosmophycinae Gill, 1862 (taxonomy source)
Brotulinae Swainson, 1838 (taxonomy source)
Brotulotaeniinae Cohen & Nielsen, 1978 (taxonomy source)
Butinae Bleeker, 1874 (taxonomy source)
Bythitidae Gill, 1861 (taxonomy source)
Bythitinae Gill, 1861 (taxonomy source)
Callanthiidae Ogilby, 1899 (taxonomy source)
Callichthyidae Bonaparte, 1835 (taxonomy source)
Callionymidae Bonaparte, 1831 (taxonomy source)
Callionymoidei accepted as Callionymiformes (taxonomy source)
Callorhinchidae Garman, 1901 (taxonomy source)
Caproidae Bonaparte, 1835 (taxonomy source)
Caproidei accepted as Caproidae Bonaparte, 1835 (taxonomy source)
Carangidae Rafinesque, 1815 (taxonomy source)
Carapidae Poey, 1867 (taxonomy source)
Carapinae Poey, 1867 (taxonomy source)
Carcharhinidae Jordan & Evermann, 1896 (taxonomy source)