Blackfish is a common name of fish.
Species which are called blackfish include:
Alaska blackfish, Dallia pectoralis
Black sea bass, Centropristis striata
Sacramento blackfish, Orthodon microlepidotus
Tautog, Tautoga onitis
Parore, Girella tricuspidata
Rudderfish, Centrolophus niger
Gadopsis, two Australian freshwater fish
Galjoen, Dichistius capensis
Japanese black porgy, Mylio macrocephalus, a large Japanese sea bream often cultivated in aquaculture
Types of cetaceans, commonly known as whales, dolphins, and porpoises
Melon-headed whale, Peponocephala electra
Killer whale (Orca), Orcinus orca
Pygmy killer whale, Feresa attenuata
False killer whale, Pseudorca crassidens
Long-finned pilot whale, Globicephala melas
Short-finned pilot whale, Globicephala macrorhynchus
