blackfish

(noun) large dark-colored food fish of the Atlantic coast of North America. Synonyms: tautog, Tautoga onitis.

(noun) female salmon that has recently spawned.

(noun) small dark-colored whale of the Atlantic coast of the United States; the largest male acts as pilot or leader for the school. Synonyms: pilot whale, black whale, common blackfish, Globicephala melaena.