Blackfish

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)