Pronunciation: (blak'fish"),[key] —n., —pl.(esp. collectively)-fish,(esp. referring to two or more kinds or species)-fish•es. 1. any of various dark-colored fishes, as the tautog, Tautoga onitis, or the sea bass, Centropristes striatus. 2. a small, freshwater food fish, Dallia pectoralis, found in Alaska and Siberia, noted for its ability to survive frozen in ice.
3. See black whale.