According to New Scientist, some scientists recently discovered a polar bear eating a dolphin. This is not really a surprise since by all accounts polar bears will eat pretty much anything they can lay their paws on. Still, for the polar bear specialist it is a good opportunity to try to push a global warming story, so at the end of the article we get this:
As the climate warms, [polar bear specialist Ian] Stirling believes the sight of polar bears tucking into weird meals could become more common. Polar bears are "willing to take and use anything possible when available", he says.
Which just goes to show how low polar bear scientists will go in their desperation to keep the funds flowing.