Sea otter pups are born with a shaggy, light yellowish-brown coat of fur called lanugo, which is even thicker than an adult’s fur. The mother’s first task is to ensure the pup’s fur is ...

Fortunately, sea otter pups also have a thick and buoyant fur coat. The mother sea otter blows warm air into her pup’s fur, which helps to keep them warm and stay afloat while she’s away.

When the mother sea otter grooms her pup, she also blows air into the pup’s coat. Although baby sea otter fur is still growing, their smaller body mass means their fur provides greater buoyant ...

SAVING THE SEA OTTER. Unlike most marine mammals, sea otters are primarily insulated by fur, not blubber. In fact they have the densest fur in the animal kingdom. Sadly that thick, resplendent coat ...

Sea otters have the densest fur of any animal on earth, with up to a million hairs per square inch (155,000 per sq cm). A human head, for comparison, has 700 hairs per sq in (110 per sq cm).