The Great White Shark preys upon a variety of fishes and marine mammals. Fish such as salmon, hake, halibut, mackerel and tunas are common prey, as are marine mammals such as harbor porpoises and harbor seals. However whites also eat other sharks, sea turtles and seabirds. They may also feed upon blubber from dead whale carcasses. Examination of the stomach contents of one great white caught off Deer Island, New Brunswick revealed three porpoises within it.
