Sea Otter Hauling Out, Elkhorn Slough, California
The sea otter (Enhydra lutris) has the densest fur of any animal. Sea otters spend most of their life in the ocean-feeding, resting, mating, and giving birth-only occasionally hauling out on land to rest. The Elkhorn Slough is one of the few places in the world where sea otters have been observed hauling out to rest.