Pollock (or pollack, pronounced the same and listed first in most UK and US dictionaries) is the common name used for either of the two species of marine fish in the Pollachius genus. Both P. pollachius and P. virens are commonly referred to as pollock. Other names for P. pollachius include the Atlantic pollock, European pollock, lieu jaune, and lythe; while P. virens is sometimes known as Boston blues (distinct from bluefish), coalfish (or coley), Silver Bills or saithe.
Food features:Both species can grow to 3 ft 6 in (1.07 m) and can weigh up to 46 lb (21 kg). The fish has a strongly-defined silvery lateral line running down the sides. Above the lateral line the color is a greenish black. The belly is white. It can be found in water up to 100 fathoms (180 m) deep over rocks, and anywhere in the water column.
Place of origin:They have a range from North Carolina up to the Gulf of St. Lawrence.
Dietotherapy function:Atlantic pollock is largely considered to be a whitefish, although it is a fairly strongly flavored one. Although traditionally a popular source of food in some countries like Norway, in the United Kingdom it has previously been largely consumed as a cheaper and versatile alternative to cod and haddock in the West Country, elsewhere being known mostly for its traditional use as "Pollack for puss / coley for the cat."