- any of various dark-colored fishes, as the tautog, Tautoga onitis, or the black sea bass, Centropristes striata.
- a small, freshwater food fish, Dallia pectoralis, found in Alaska and Siberia, noted for its ability to survive frozen in ice.
- black whale.
- a minnow-like Alaskan freshwater fish, Dallia pectoralis, related to the pikes and thought to be able to survive prolonged freezing
- a female salmon that has recently spawned
- any of various other dark fishes, esp the luderick, a common edible Australian estuary fish
- another name for pilot whale
