Harbor porpoises are small, stocky whales.
Harbor porpoises have dark brown or gray backs and a lighter sides, with a white tummy. Harbor porpoises have 19-28 teeth. The use their teeth to grasp and tear their food. Harbor porpoises are eaten by killer whales and great white sharks. Harbor porpoises are usually seen in small groups of 2 to 10 animals, however, once in a while larger herds of 50 or so animals are seen together.