The walrus has a diverse and opportunistic diet, feeding on more than 60 genera of marine organisms, including shrimp, crabs, tube worms, soft corals, tunicates, sea cucumbers, various mollusks, and even parts of other pinnipeds [REF].
Due to its great size and tusks, the walrus has only two natural predators: the killer whale (orca) and the polar bear [REF].