Blackfish is a common name for various species of fishes and cetaceans, including:

Fish

• Alaska blackfish (Dallia pectoralis), an esocid from Alaska, Siberia, and the Bering Sea islands

• Black fish (Carassioides acuminatus), a cyprinid from China and Vietnam

• Black ruff (Centrolophus niger)

• Black sea bass (Centropristis striata)

• Black triggerfish

• Cornish blackfish (Schedophilus medusophagus)

Gadopsis, two Australian freshwater fish:

• River blackfish (G. marmoratus)

• Two-spined blackfish (G. bispinosus)

• Galjoen (Dichistius capensis)

• Imperial blackfish (Schedophilus ovalis)

• Japanese black porgy (Acanthopagrus schlegelii), a large sea bream often cultivated in aquaculture

• Parore (Girella tricuspidata)

• Sacramento blackfish (Orthodon microlepidotus)

• Tautog (Tautoga onitis)

Dolphins

• Pilot whales (Globicephala)

• Melon-headed whale (Peponocephala electra)

• False killer whale (Pseudorca crassidens)

• Pygmy killer whale (Feresa attenuata)

• Orca (Orcinus orca)