A type of seal is an EARED seal, which has external ear flaps and lives in the cold waters of the Arctic and Antarctic. An EASTER seal is a type of seal that is used to raise money for charities. A HARP seal is a species of earless seal found in the northernmost Atlantic and Arctic Oceans. A GASKET seal is a mechanical seal used to join two surfaces together and prevent leakage. A sealion is a type of sea mammal that is related to seals and walruses.