Either of two dark-coloured fish of the west Atlantic, the tautog of New England (Tautoga onitis) and the black sea bass (Centropristis striata).
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).
Any of various dark-coloured fishes of Australasia, especially the luderick, Girella tricuspidata, and a freshwater fish, Gadopsis marmoratus.
To go fishing for blackfish.
To adopt signifiers of black identity (for example, by darkening the skin, or wearing traditionally black hairstyles).
A fish of the wrasse family found in salt water off of eastern North America from Nova Scotia to South Carolina (Tautoga onitis).