black cod
noun
1The saithe or coalfish, Pollachius virens;.
2Any of various fishes of the family Nototheniidae, of southern oceans, which are predominantly dark with pale marbling; especially Notothenia microlepidota, and ( NZ ) Paranotothenia magellanica; compare Maori chief.
3The sablefish, Anoplopoma fimbria.
Origin
Late 17th century; earliest use found in Nehemiah Grew (a1641–1712), botanist and physician.