Seals live in all oceans. They usually go in shallow waters. They mostly go on land or ice. They can eat fish, krill, penguins, sea birds, smaller seals, squid and dead whales. Seals move with little flippers at the end of their arms and legs. Seals are hunted by killer whales, sharks, polar bears and men. Seals whoop, scream, bark and wail when they need help. A seal can bend over backwards and touch their nose to their feet. Seals can swim for two hours. They have a thick layer of blubber that keeps them warm in cold water. They are carnivores who like to eat fish, birds and krill.