The polar bear (Ursus maritimus), a bear native to the Arctic. Its thick blubber and fur insulate it against the cold. Its fur is translucent but usually appears as white or cream coloured, thus providing the animal with effective camouflage. The polar bear is a semi-aquatic marine mammal that depends mainly upon the pack ice and the marine food web for survival. It has adapted for life on a combination of land, sea, and ice.