Northern Fur Seal

Callorhinus ursinus

The northern fur seal (Callorhinus ursinus) is a marine mammal in the family Otariidae. Adult males reach up to 2.1 m and 270 kg, while females are considerably smaller at about 1.4 m and 50 kg. They have a dense, dark brown to black underfur with longer guard hairs, small external ear flaps, and large, expressive eyes. Males develop a thick neck and mane during maturity. This species inhabits the North Pacific Ocean, with major breeding colonies on the Pribilof Islands (Alaska), Commander Islands (Russia), and smaller colonies on other North Pacific islands. They spend most of their life at sea, diving to depths of up to 200 meters to feed on fish and squid. Northern fur seals are highly curious and playful, often approaching and interacting with divers in entertaining displays of underwater acrobatics. Their large, dark eyes and agile swimming make underwater encounters with them a thrilling and memorable experience.