Both species commonly referred to as pollock, the Alaskan pollock and Atlantic pollock, have scales. The presence of scales is especially important for members of the Jewish faith who are only permitted to eat kosher fish, which must have both fins and scales.
Pollock is a member of the cod family of fish. Both species of pollock are whitefish with a delicate and flaky texture. The Atlantic pollock, found on both sides of the Atlantic Ocean, has a stronger flavor than the Alaskan, which hails from the North Pacific in one of the most valuable and largest fisheries in the world. Due to the rapid reproduction and maturity rate of Alaskan pollock, it is safe to harvest them much more frequently without fear of overfishing.