sea li·on • n. 1. an eared seal occurring mainly on Pacific coasts, the large male of which has a mane on the neck and shoulders. 2. Heraldry a mythical beast formed of a lion's head and foreparts and a fish's tail.

sea lion Any of five species of seals that live in coastal waters of the Pacific and feed primarily on fish and squid. They have streamlined bodies and long fore flippers for propulsion. The males of all species, except the California sea lion (Zalophus californianus), have manes. The largest species is the Steller sea lion (Eumetopias jubata); it may reach 3.3m (11ft) in length. Order Pinnepedia; family Otariidae.

sea lion See OTARIIDAE.