Move over veggies. Polar Bears survive almost entirely on seals. But in a pinch, these bears will snack on walruses, Narwhals, Beluga Whales and carrion (dead animals). And, boy, can these bears indulge! An adult male Polar Bear can gobble up 68 kilograms of meat in a single meal. They need all the grub they can get before summer, when they live mostly on their fat stores.