sablefishEnglishOxford New American Dictionarysablefish /ˈsābəlˌfiSH, ˈseɪbəlˌfɪʃ / ▸ noun (plural same or sablefishes) a large commercially important fish with a slate-blue to black back, occurring throughout the North Pacific. Anoplopoma fimbria, family Anoplopomatidae.