The last family only has one member, all other members have gone extinct. When speaking of Odobenidae, it always concerns one species – the walrus (Odobenus rosmarus). Walruses are mostly found in the Arctic, but sometimes venture into subarctic areas.

walrussen 1Walruses are very recognisable by their thick, short whiskers and large tusks that grow out of the upper jaw. Those tusks are unique to walruses, as no other pinniped has them. Walruses don’t have pinna, a trait they have in common with true seals. They do, however, have the ability to fold their hind flippers underneath the body, allowing them to move about on land like otariids. Because walrus fur is very short, it might seem to the untrained eye that they are bald. Male walruses grow a little bigger than females, and develop wart-like bumps on the neck and chest as they get older. Walruses are fairly social animals, congregating in large groups during mating season. Outside of mating season, the males live together in groups, while the females live alone with their pups (if they have them). Mother and pup stay together for quite a long time. After a long pregnancy of around fifteen months, the pup will stay with the mother for at least two years. Because of the long pregnancy and nursing period, female walruses will only mate and produce a pup every two to three years. Walruses reach sexual maturity at ten years old and can reach a maximum age of 40 years old.

walrussen 2