or great sea otter
Rare, completely marine otter ( Enhydra lutris ) of the northern Pacific, usually found in kelp beds.
Floating on its back, it opens mollusks by smashing them on a stone balanced on its chest. The large hind feet are broad and flipperlike. It is 4065 in. (100160 cm) long and weighs 3590 lbs (1640 kg). The thick lustrous coat is reddish to dark brown. By 1910 it had been hunted almost to extinction for its fur; now fully protected, it is gradually increasing in numbers.