The seal is a kind of marine animal with a dull appearance. It is a creature in the suborder Carnivora and Pinniped. The body of the seal is relatively fat, with two limbs at the front and back of the body, a total of four limbs. Their limbs function more like the legs of terrestrial animals, or more like the feet of terrestrial animals, and can play an important role in their activities. However, strictly speaking, the flippers of seals can not be mixed with the legs and feet of terrestrial animals, because they are quite different from each other in appearance. It has five toes on each flipper and webs between the toes, much like fish fins, so it is called flipper.
If we define the foot in terms of function, then the fin foot of the seal and the foot of the terrestrial animal have the same function, so we can say that there are four feet. But after all, flippers and feet are very different, so if you look at it from a strict definition, seals have no feet.
Teeth are one of the important structures of animals, which play an important role in hunting and eating. Seals have teeth, too. If we can see real seals at close range, or if we can observe seals eating, we can clearly observe their teeth, which are relatively sharp. Wild seals use sharp teeth to hunt, and seals mainly eat fish, cephalopods and crustaceans. When they catch food, they also use their teeth to break it up and eat it. Seals that live in aquariums also need teeth, and they mainly use them to eat.
