The walrus on the other hand walks on all four fins. He can move on land as fast as a man can run. The walrus migrates in the spring and fall following the food. The coming of many ice floes tells him when to migrate. His diet consists of clams, snails, crabs, shrimp and worms, ie, bottom-dwelling invertebrates.
Clams are the principal food of the walrus.
He grubs the clams from the sea bottom with his snout or blow them loose with a jet of water, then sucks the clams from their shells. He can dive down a hundred metres to get his favourite food from the sea bottom. He can eat 4,000 clams in one feeding. The tusks may be the first thing to notice on a walrus. Both the male and female walrus have them.