The polar bear is a species of bear in the family Ursidae, and is the world's largest terrestrial carnivore, also known as the white bear. The body is large and robust, with a shoulder height of up to 1.6 meters. Adult males weigh between 300-800 kilograms and can grow up to 2.5 meters in length. Females are relatively small, weighing 150-300 kilograms and measuring 1.8-2 meters in length. Similar to brown bears, but without shoulder humps. The head is relatively smaller than other bears, with small and round ears and a slender neck. The skin is black, and due to transparent hair, it usually appears white in appearance. There are also yellow and other colors, and the body is huge and fierce.