blackfish

The Atlantic salmon, Salmo salar, especially a female after spawning.

Any of various dark-coloured fish of the Old World, especially the rudderfish (Centrolophus niger).

A pilot whale, genus Globicephalus (occasionally also used for various other whales).

Either of two dark-coloured fish of the west Atlantic, the tautog of New England (Tautoga onitis) and the black sea bass (Centropristis striata).

Any of various dark-coloured fishes of Australasia, especially the luderick, Girella tricuspidata, and a freshwater fish, Gadopsis marmoratus.

To go fishing for blackfish.