A sea lion is a marine mammal known for its playful behavior and agility in the water. They belong to the family Otariidae, which also includes fur seals. Sea lions have external ear flaps, long front flippers, and a streamlined body, making them excellent swimmers. They primarily inhabit coastal areas and are often seen lounging on rocks or beaches. These animals are social creatures, often found in large groups called colonies. They primarily feed on fish and squid, using their keen eyesight to hunt underwater. Sea lions are also known for their vocalizations, which include barks and growls, helping them communicate with one another.