Blue cod

Blue cod is also a common name for Anoplopoma fimbria (sablefish) in the UK.

Blue cod, Parapercis colias, is a temperate marine fish of the family Pinguipedidae. It is also known variously as Boston blue cod, New Zealand cod, sand perch or its Māori names rawaru and pakirikiri.

It is exclusively found in New Zealand in shallow waters around the rocky coasts of up to the depth of 150 m, though it is far more common south of Cook Strait. It is bluish green to blue black above with white toward the belly. Large examples are usually greenish blue in colour, while smaller ones are blotched in varying shades of brown. An adult may grow to 60 cm in length and weigh from one to three kg. It feeds mainly on small fish and crabs. Blue cod is strongly territorial. Spawning takes place in southern spring. Blue cod can also change sex from female to male.