Walruses are native to Canada, Alaska, Greenland, Norway (Svalbard) and Russia. Due to migration they can also be found around Japan, the British Isles, Iceland, Belgium and the Netherlands.
They are one of the largest pinnipeds, male walruses may reach about 3.6 m in length and weigh up to 1.900 kg, females are somewhat smaller with a length of 3 m and a weight of up to 1.200 kg.
Natural predators of the walrus are polar bears (Ursus maritimus), killer wales (Orcinus orca) and humans.
Both males and females wear large tusks which may grow to a length of 90 cm, the average size, however, is 50 cm.
When fighting for females during the mating season males injure each other heavily with their tusks.
Although walruses mainly feed on small invertebrates, e.g. bivalve mollusks, individuals occasionally prey on smaller seals.
Due to their giant body mass, walruses appear rather clumsy ashore, but under water they are elegant swimmers and skillful hunters.