Pacific cod
(Gadus macrocephalus)

The Pacific cod (Gadus macrocephalus) is a species of ray-finned fish in the family Gadidae. It is a bottom-dwelling fish found in the northern Pacific Ocean, mainly on the continental shelf and upper slopes, to depths of about 900 m (3,000 ft). It can grow to a length of a meter or so and is found in large schools. It is an important commercial food species and is also known as gray cod or grey cod, and grayfish or greyfish. Fishing for this species is regulated with quotas being allotted for hook and line fishing, pots, and bottom trawls. Fossils have been found in Canada near a Steller Sea lion fossil dating to the Pleistocene.

It has three separate dorsal fins, and the catfish-like whiskers on its lower jaw. In appearance, it is similar to the Atlantic cod. A bottom dweller, it is found mainly along the continental shelf and upper slopes with a range around the rim of the North Pacific Ocean, from the Yellow Sea to the Bering Strait, along the Aleutian Islands, and south to about Los Angeles, down to depths of 900 m (3,000 ft; 500 fathoms). It may grow up to 1 m (40 in) in length and weigh up to 15 kg (33 lb). It is found in huge schools.

Molecular genetic analyses strongly suggest that Pacific cod and Greenland cod (Gadus ogac) from Greenland–Arctic Ocean are the same species and that G. ogac should be a junior synonym of G. macrocephalus. Today, ITIS and the Catalogue of Life list Gadus ogac as synonym of G. macrocephalus.