seal

Any of various aquatic carnivorous mammals of the families Phocidae and Otariidae, found chiefly in cold regions and having a sleek torpedo-shaped body and limbs that are modified into paddlelike flippers.

The pelt or fur of one of these animals, especially a fur seal.

Leather made from the hide of one of these animals.

To hunt seals.

A device or material that is used to close off or fasten an opening or connection, especially to prevent the escape of a liquid or gas.