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 has also given otters ...

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.

and it starts with a roll in the snow to keep its fur coat insulated. The waters in the Upper Peninsula of Michigan freeze over fast in winter–and river otters need to work just as fast to keep ...

Sea otter mamas are parenting on hard mode. They give birth in the water, to blind, helpless infants who have to be carried ...