Pollock can grow to 105 centimetres (3.44 ft) and can weigh up to 21 kilograms (46 lb). P. virens has a strongly defined, silvery lateral line running down the sides. Above the lateral line, the colour is a greenish black. The belly is white, while P. pollachius has a distinctly crooked lateral line, grayish to golden belly, and a dark brown back.
Pollock is largely considered to be a whitefish, although it is a fairly strongly flavoured one. Pollock is traditionally a popular of fish in some countries, such as Norway, in the United Kingdom