Sources: Harvested by factory trawlers that process on board and by   smaller boats
Harvest Areas: Alaska pollock range from California to Japan   Atlantic pollock , are found in the cold North Atlantic waters of   Great Britain, Iceland, and Scandinavia.
Seasonality: Alaska pollock are in season from July through September   and from December through April. Atlantic pollock are in   season in spring.
Fish  Size:Alaska Pollock weigh 1 1/2 to 2 pounds. Atlantic Pollock up to   43 inches in length and 35 pounds in weight.
Cut Spec: whole, dressed, fillets

Features:

Because of their high oil content, pollock are a bit more   pronounced in flavor and take longer to cook than leaner fish   of similar size. Both types of pollock are mild and delicate in   flavor with somewhat coarse texture. Boneless fillets are   creamy tan in color. Cooked, the lean meat is white and firm   with good flake. Full-grown Atlantic pollock meat is grayish in   color.

Benefits:

The pollock's light flaky flesh can be substituted for cod or   haddock in most recipes.  Pollock can be poached, baked,   broiled, grilled or put into fish chowders.
Cost Effective