Rod Bibarba
- Bibarba bibarba Chen & Chen, 2007
Actinopterygii > Cypriniformes > Cobitidae
Rod Bidenichthys
- Bidenichthys beeblebroxi Paulin, 1995
- Bidenichthys capensis Barnard, 1934
- Bidenichthys consobrinus (Hutton, 1876)
Actinopterygii > Ophidiiformes > Bythitidae
Rod Bidyanus
- Bidyanus bidyanus (Mitchell, 1838)
- Bidyanus welchi (McCulloch & Waite, 1917)
Actinopterygii → Perciformes → Terapontidae
Rod Bifax
- Bifax lacinia Greenfield, Mee & Randall, 1994
Actinopterygii > Batrachoidiformes > Batrachoididae
Rod Bihunichthys Kottelat & Lim, 1994
- Bihunichthys monopteroides Kottelat & Lim, 1994
Pisces → Actinopterygii → Synbranchiformes → Chaudhuriidae
Rod Bilabria Schmidt, 1936
- Bilabria gigantea Anderson & Imamura, 2008
- Bilabria ornata (Soldatov, 1922)
Pisces → Actinopterygii → Perciformes → Zoarcidae
Rod Biotodoma
- Biotodoma cupido (Heckel, 1840)
- Biotodoma wavrini (Gosse, 1963)
Actinopterygii > Perciformes > Cichlidae
Rod Biotoecus
- Biotoecus dicentrarchus Kullander, 1989
- Biotoecus opercularis (Steindachner, 1875)
Actinopterygii > Perciformes > Cichlidae
Rod Bivibranchia
- Bivibranchia bimaculata Vari, 1985
- Bivibranchia fowleri (Steindachner, 1908)
- Bivibranchia notata Vari & Goulding, 1985
- Bivibranchia simulata Géry, Planquette & Le Bail, 1991
- Bivibranchia velox (Eigenmann & Myers, 1927)
Actinopterygii > Characiformes > Hemiodontidae
Biwia Jordan & Fowler, 1903
- Biwia springeri (Bănărescu & Nalbant, 1973)
- Biwia tama Oshima, 1957
- Biwia yodoensis Kawase & Hosoya, 2010
- Biwia zezera (Ishikawa, 1895)