They have a thick layer of fat so they can keep warm.
Their fur is their main defense against the cold. It's well insulated with the fatty layer underneath and is very warm. The body core provides all the warmth they need. Even though they are not black (usually what attracts heat to their body) they can survive in cold harsh winter nights with just their coat.
Seals have a thick layer of fat around their bodies, plus oily, waterproof fur to help insulate them.
They have a layer of blubber to keep themselves warm.
Warmth
Yes, it keeps them warm.
A thick layer of blubber (fat) which insulates them from the cold.
The blubber protects the walrus from the cold.
Seals have blubber, a layer of fat, which keeps them warm.
Seals have a thick layer of blubber, or fat, under the skin, which insulates them from the cold in the water and on ice or land.
The thick layer of fat under the fur of an animal is called blubber. This layer helps provide insulation, store energy, and regulate body temperature in animals living in cold environments, such as marine mammals like whales and seals.
You need a"Essential Body Fat"to stay alive without getting to "excessive body fat" The fat layer that is directly under the skin called subcutaneous fat. This fat layer provides thermal protection and bruise protection.
Whales and Seals have a layer of fat under their skins which act as an insulator/prevent heat loss from their bodies