Phocid seals, like other pinnipeds, have a layer of hair and a specialized fat layer called blubber.  Blubber serves many functions but chief among them are providing thermal protection and serving as an energy storage depot.  

Published in Harbor Seal

The integument of a cetacean is more than just fat! Indeed the integument, commonly called blubber, of cetaceans is a very special organ because it performs multiple functions. Blubber is a fat filled tissue which covers the body of the animal and keeps the animal warm in a cold, thermally conductive environment. But blubber is also an energy storage depot and helps streamline the body, reducing drag.

Published in Harbor Porpoise

The integument (skin or pelt) of marine mammals is a very special organ! In cetaceans (dolphins, porpoises, whales) the skin is smooth and sleek and feels very similar to a hard boiled egg. In pinnipeds (seals, sea lions, and fur seals), the skin is covered in a layer of hair which can vary greatly in its thickness depending on the species.

Published in California Sea Lion