The largest type of bear is the polar bear (Ursus maritimus). Adult male polar bears can weigh between 900 to 1,600 pounds, standing up to 10 feet tall when on their hind legs. They are primarily found in the Arctic region, where they hunt seals on sea ice, relying on their thick blubber and fur for insulation against the cold. Polar bears are classified as marine mammals, as they spend most of their lives on the sea ice of the Arctic Ocean and its surrounding seas and coastlines. They are iconic symbols of the effects of climate change due to the melting ice in their habitats.