The polar bear is a bear native to the Arctic Ocean and its surrounding seas. An adult male weighs about four hundred to six hundred and eighty kilograms, while an adult female is about half that size. Although it is closely related to the brown bear, it has paws to occupy a narrow ecological niche with many bony characteristics adapted to for cold temperatures, for moving across the snow, ice, open water, and for hunting seals which make up most of its diets. Although most of polar bears are born on land, it spends most of its time at sea, hence its name meaning maritime bear and can hunt consistently only from sea ice. It spends much of the year on frozen sea.

What does the adult male bear weigh?