Seal

Pinnipeds, often generalized as seals, are a widely distributed and diverse clade (a taxonomic group) of fin-footed, semiaquatic marine mammals. ... They have streamlined bodies and four limbs that are modified into flippers. Though not as fast in the water as dolphins, seals are more flexible and agile. ... Although pinnipeds are widespread, most species prefer the colder waters of the Northern and Southern Hemispheres. They spend most of their lives in the water, but come ashore to mate, give birth, molt or escape from predators, like sharks and killer whales. They feed largely on fish and marine invertebrates... [Pinniped. Wikipedia]