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The polar bear is a marine mammal because it spends many months of the year at sea.[44] However, it is the only living marine mammal with powerful, large limbs and feet that allow them to cover miles on foot and run on land.[45] Its preferred habitat is the annual sea ice covering the waters over the continental shelf and the Arctic inter-island archipelagos

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it has evolved to occupy a narrower ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice and open water, and for hunting seals, which make up most of its diet.[6] Although most polar bears are born on land, they spend most of their time on the sea ice

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The polar bear (Ursus maritimus) is a carnivorous bear whose native range lies largely within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It is a large bear, approximately the same size as the omnivorous

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A boar (adult male) weighs around 350–700 kg (772–1,543 lb),[4] while a sow (adult female) is about half that size. Although it is the sister species of the brown bear,