The arctic polar bear feeds almost entirely on seals. To enjoy such a meal, he sometimes resorts to a cunning bit of trickery. If the hole in the ice through which the seal gets his food is not too far from the edge of open water, the polar bear will take a deep breath, slip underwater, and swim to the seal's fishing hole. He will then imitate a fish by scratching lightly on the underside of the ice. When the seal hears this sound, he dives in for a quick supper, only to find himself suddenly caught in the huge, hungry embrace of his predator.