Both males and females have tusks, but the males have slightly longer tusks. Walruses have 16 other, much shorter, teeth. Walruses have air sacs in their throat that let their head stay above the water - these air sacs act like a life preserver. A thick layer of fat insulates the walrus from the cold Arctic waters. The nostrils are closed in the resting state.
Walruses can walk on all four legs when they are on land.
If they are very hungry, they will eat seals.