Clams, cockles and mussels are the walrus' main food. It uses the bristles of its moustache to sense its prey in the murky waters just above the sea bed. It possibly also uncovers food in soft mud by squirting water from its mouth.
Walruses will eat other marine invertebrates such as shrimps, worms, octopuses, sea cucumbers and some fish. They will even attack seals, grasping them with their forelimbs and slashing at them with their tusks.