This pinniped uses its tusks to dig mollusks from the ocean floor
Diving to depths of up to 180 metres for up to 24 minutes at a time, it 
uses its ... seldom occurring in deeper water (as it has to forage on the ocean 
floor), and... [DOC] [TLE] The Marine Biome Marine Vertebrates: Pinnipeds and Carnivora ... [PAR] 10 Pinnipeds Sea Lions: Have ear flaps Front flippers are used to propel through 
... 16 Pinnipeds Walruses: Large protruding tusks for digging mollusks Stiff 
whiskers for feeding on ocean floor Some have blubber up to 6 inches thick ... 
dense fur Eat mostly shell fish or small fish Spend most of the day maintaining 
their fur.