They comprise the extant families Odobenidae (whose only living member is the walrus), Otariidae (the eared seals: sea lions and fur seals), and Phocidae (the earless, or true seals). Seals range ...

Fur seals have sharp eyesight and keen hearing. They have small ears, unlike the earless or hair seals. Although they breathe air, seals are most at home in the water and may stay at sea for weeks ...