noun pl. blackfish, blackfishes
- ☆ any of a genus (Globicephala) of large, black, migratory dolphins; pilot whale
- any of a number of dark marine fishes, as a sea bass or tautog
- an edible Siberian or Alaskan freshwater fish (Dallia pectoralis) of the same order (Salmoniformes) as trout, pike, and salmon: reputed to revive after being frozen