Food sources differ between life history stages. Larval pollock subsist initially on yolk contained in egg sacks. Small larvae consume larval copepods, while larger larvae consume adult copepods (Steele 1963). Juvenile pollock subsist mainly on crustaceans, particularly the euphausiid Meganyctiphanes norvegica (Collette and Klein-MacPhee 2002), and to a lesser degree on fish and mollusks. Adults feed on crustaceans, fish, and mollusks as well, but the relative importance of these varies with the size of individual. The smallest adults (41 to 65 cm) feed primarily on crustaceans, medium size adults (66 to 95 cm) feed mainly on fish such as Atlantic herring Clupea harengus, while the largest adults (> 95 cm) feed on mollusks such as squid Loligo (Bowman and Michaels 1984).
Animal Foods: fish; mollusks; aquatic crustaceans
Primary Diet: carnivore (Piscivore , Eats non-insect arthropods, Molluscivore )