Is a polar bear a marine mammal or a land mammal?

It is a marine mammal. They are closely related to bear family. They are considered as a marine mammal because they have all similar characteristics of a marine lifestyle. read more

Yes. Polar bears suckle their young, have hair or fur and arewarm-blooded, maintaining their internal body heat regardless ofthe outside temperature. Polar bears are a member of the bearfamily (Ursidae) and are sometimes seen as a marine mammal becauseit spends a lot of time at sea. read more

For example, dolphins and whales are completely dependent on the marine environment for all stages of their life; seals feed in the ocean but breed on land; and polar bears must feed on land. Twenty three percent of marine mammal species are threatened. The cetaceans became aquatic around 50 million years ago (mya). read more