Acanthoclinidae Günther, 1861 accepted as Acanthoclininae Günther, 1861 (taxonomy source)
Acanthoclininae Günther, 1861 (taxonomy source)
Acanthuridae Bonaparte, 1835 (taxonomy source)
Acanthuroidei accepted as Acanthuriformes (taxonomy source)
Achiropsettidae Heemstra, 1990 (taxonomy source)
Acipenseridae Bonaparte, 1831 (taxonomy source)
Acipenseriformes (taxonomy source)
Acropomatidae Gill, 1893 (taxonomy source)
Actinopteri (basis of record)
Adrianichthyidae Weber, 1913 (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)
Amarsipidae Haedrich, 1969 (taxonomy source)
Ambassidae Klunzinger, 1870 (taxonomy source)
Amblyopinae Günther, 1861 (taxonomy source)
Amiidae Bonaparte, 1831 (taxonomy source)
Amiiformes (taxonomy source)
Ammodytidae Bonaparte, 1835 (taxonomy source)
Amphiliidae Regan, 1911 (taxonomy source)
Amphiliinae Regan, 1911 (taxonomy source)
Anabantoidei accepted as Anabantiformes (taxonomy source)
Anacanthobatidae von Bonde & Swart, 1923 (taxonomy source)
Anguillidae Rafinesque, 1810 (taxonomy source)
Anguilliformes (taxonomy source)
Anisochrominae Smith, 1954 (taxonomy source)
Anomalopidae Gill, 1889 (taxonomy source)
Anoplogastridae Gill, 1893 (taxonomy source)
Anostomidae Günther, 1864 (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)
Apistidae Gill, 1859 (taxonomy source)
Aploactinidae Jordan & Starks, 1904 (taxonomy source)
Aplocheilichthyinae Myers, 1928 (taxonomy source)
Aplocheilidae Bleeker, 1859 (taxonomy source)
Aplodactylidae Günther, 1859 (taxonomy source)
Apogonidae Günther, 1859 (taxonomy source)
Apogoninae Günther, 1859 (taxonomy source)
Apsilinae Johnson, 1980 accepted as Lutjanidae Gill, 1861 (source of synonymy)
Aracanidae Hollard, 1860 (taxonomy source)
Argentinidae Bonaparte, 1846 (taxonomy source)
Arhynchobatidae Fowler, 1934 (taxonomy source)
Ariidae Bleeker, 1858 (taxonomy source)
Ariinae Bleeker, 1858 (taxonomy source)
Ariommatidae Haedrich, 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)
Aulopidae Bonaparte, 1831 (taxonomy source)
Aulopiformes (taxonomy source)
Aulostomidae Rafinesque, 1815 (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)
Bathyclupeidae Gill, 1896 (taxonomy source)
Bathygadinae Jordan & Evermann, 1898 (taxonomy source)
Bathylagidae Gill, 1884 (taxonomy source)
Bathymyrinae Böhlke, 1949 (taxonomy source)
Bathysauridae Fowler, 1944 (taxonomy source)
Bathysauropsidae Sato & Nakabo, 2002 accepted as Ipnopidae Gill, 1884 (taxonomy source)
Batrachoididae Jordan, 1896 (taxonomy source)
Batrachoidiformes (taxonomy source)
Batrachoidinae Jordan, 1896 (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)
Bovichtidae Gill, 1862 (taxonomy source)
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)
Caesionidae Bonaparte, 1831 (taxonomy source)
Callanthiidae Ogilby, 1899 (taxonomy source)
Callionymidae Bonaparte, 1831 (taxonomy source)
Callionymoidei accepted as Callionymiformes (taxonomy source)
Callorhinchidae Garman, 1901 (taxonomy source)
Caproidae Bonaparte, 1835 (taxonomy source)