blackfish

[blak-fish] /ˈblækˌfɪʃ/
noun, plural (especially collectively) blackfish (especially referring to two or more kinds or species) blackfishes.
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.
Origin
1680-90, Americanism; black + fish
Examples from the web for blackfish
  • Currently, there is a demand for live blackfish on the restaurant market.
British Dictionary definitions for blackfish

blackfish

/ˈblækˌfɪʃ/
noun (pl) -fish, -fishes
1.
a minnow-like Alaskan freshwater fish, Dallia pectoralis, related to the pikes and thought to be able to survive prolonged freezing
2.
a female salmon that has recently spawned Compare redfish (sense 1)
3.
any of various other dark fishes, esp the luderick, a common edible Australian estuary fish
4.
another name for pilot whale