Polar bears are the only bear species considered marine mammals. [VID: Did you know? Polar bears are classified as marine mammals. Polar bears spend most of their lives on the sea ice of the Arctic Ocean. They depend on the ocean for food and are well adapted to their cold ocean habitat. Their large paws are specially adapted for swimming. In the water, they can reach speeds of up to 6mph. They can swim steadily for many hours over long distances when traveling from one ice floe to another.] | N

5.4K views · 519 reactions | It's been warm out and polar bears Astra and Laerke are staying cool swimming in their deep pool! ‍❄️ | Point Defiance Zoo & Aquarium | Facebook