Seals
Polar bears can't catch enough seals to stay fed: study
Polar bear survival has been declining in the past decade.
Endangered orcas compete with seals, sea lions for salmon
A study suggests that competition from other marine mammals might be bigger problem for a small group of killer whales.
Seal pup rests on Australian beach after exhausting 2000km journey from Antarctic
The baby seal spent the day relaxing on the beach before returning to the water later that night.
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