The primary habitat of polar bears is the Arctic region, specifically the sea ice of the Arctic Ocean and its surrounding seas and coastlines. These marine mammals rely on sea ice as a platform for hunting seals, which are their primary source of food. Polar bears are uniquely adapted to their cold environment, with thick fur and a layer of fat to insulate them against frigid temperatures. Climate change poses a serious threat to polar bears as melting sea ice diminishes their habitat, making it more challenging for them to find food and increasing their vulnerability to starvation and decreased population numbers.