Abyssocottidae (current name source)
Acanthoclinidae accepted as Plesiopidae (source of synonymy)
Acanthuridae (current name source)
Acestrorhynchidae (current name source)
Achiridae (current name source)
Achiropsettidae (current name source)
Acipenseridae Bonaparte, 1831 (current name source)
Acropomatidae (current name source)
Adrianichthyidae (current name source)
Agonidae (current name source)
Akysidae (current name source)
Albulidae Bleeker, 1859 (current name source)
Alepisauridae (current name source)
Alepocephalidae (current name source)
Alestidae (current name source)
Alopiidae Bonaparte, 1838 (current name source)
Amarsipidae (current name source)
Ambassidae (current name source)
Amblycipitidae (current name source)
Amblyopsidae (current name source)
Amiidae Bonaparte, 1837 (current name source)
Ammodytidae (current name source)
Amphiliidae (current name source)
Anabantidae (current name source)
Anablepidae (current name source)
Anacanthobatidae (current name source)
Anarhichadidae (current name source)
Anchariidae (current name source)
Anguillidae (current name source)
Anisochromidae accepted as Pseudochromidae (source of synonymy)
Anomalopidae (current name source)
Anoplogastridae (current name source)
Anoplopomatidae (current name source)
Anostomidae (current name source)
Anotopteridae (current name source)
Antennariidae (current name source)
Aphredoderidae (current name source)
Aphyonidae (current name source)
Apistidae (current name source)
Aploactinidae (current name source)
Aplocheilichthyidae accepted as Poeciliidae (source of synonymy)
Aplocheilidae (current name source)
Aplochitonidae accepted as Galaxiidae (source of synonymy)
Aplodactylidae (current name source)
Apogonidae (current name source)
Apteronotidae (current name source)
Aracanidae (current name source)
Arapaimidae (current name source)
Argentinidae Bonaparte, 1846 (current name source)
Arhynchobatidae Nelson, 2006 (current name source)
Ariidae (current name source)
Ariommatidae (current name source)
Arripidae (current name source)
Artedidraconidae (current name source)
Aspredinidae (current name source)
Astroblepidae (current name source)
Astronesthidae accepted as Stomiidae (source of synonymy)
Ateleopodidae (current name source)
Atherinidae Risso, 1827 (current name source)
Atherinopsidae Fitzinger, 1873 (current name source)
Auchenipteridae (current name source)
Aulopidae (current name source)
Aulorhynchidae (current name source)
Aulostomidae (current name source)
Austroglanididae Mo, 1991 (current name source)
Badidae (current name source)
Bagridae Bleeker, 1852 (current name source)
Balistidae (current name source)
Balitoridae (current name source)
Banjosidae (current name source)
Barbourisiidae Parr, 1945 (current name source)
Bathyclupeidae (current name source)
Bathydraconidae (current name source)
Bathygadidae accepted as Macrouridae Gilbert & Hubbs, 1916 (source of synonymy)
Bathylaconidae accepted as Alepocephalidae (source of synonymy)
Bathylagidae Gill, 1884 (current name source)
Bathylutichthyidae (current name source)
Bathymasteridae (current name source)
Bathypteroidae accepted as Ipnopidae (source of synonymy)
Bathysauridae (current name source)
Bathysauroididae (current name source)
Bathysauropsidae accepted as Ipnopidae (source of synonymy)
Batrachoididae (current name source)
Bedotiidae (current name source)
Belonidae (current name source)
Belontiidae accepted as Osphronemidae (source of synonymy)
Bembridae (current name source)
Berycidae (current name source)
Blenniidae (current name source)
Bothidae (current name source)
Botiidae accepted as Cobitidae (source of synonymy)
Bovichthyidae accepted as Bovichtidae (source of synonymy)
Bovichtidae (current name source)
Brachaeluridae Compagno, 1973 (current name source)
Brachionichthyidae (current name source)
Bramidae (current name source)
Branchiostegidae accepted as Malacanthidae (source of synonymy)
Bregmacerotidae Gill, 1872 (current name source)
Brotulidae accepted as Ophidiidae (source of synonymy)
Bryconidae (current name source)