Pacific cod + Alaska pollock

The Pacific cod, Gadus macrocephalus, is an important commercial food species. It is also known as gray cod or grey cod, and grayfish or greyfish. 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 the depths of 900 meters (~ 3000 feet). May grow up to 1 m (39") and weigh up to 15 kg (33 lbs). It is found in huge schools.

Alaska pollock or walleye pollock (Theragra chalcogramma) is a species of the cod family Gadidae. Alaska pollock is a semipelagic schooling fish widely distributed in the North Pacific with largest concentrations found in the eastern Bering Sea. While related to the common Atlantic pollock species of the same family, the Alaska pollock is not a member of the same Pollachius genus. Rather, recent research suggests that it is more closely related to Atlantic cod, and that Alaska pollock should be moved back to genus Gadus in which it was originally described as Gadus chalcogrammus. Furthermore, Norwegian pollock (Theragra finnmarchica), a rare fish of Norwegian waters, is likely the same species as the Alaska pollock.