Only one possible answer.

Taking the only logical two species of these animals to fight (the great white shark and polar bear, who would obviously be fighting over a seal), I'd go with the bear, but it would be really, really, REALLY close. It would be close like Superman vs. Batman, but the same single factor would end up tipping the scales: intelligence.

Batman would beat Superman because he'd use his brain and fight dirty, whereas Superman has one mode: honorable.

The great white is a killing machine, but that's all it is. A polar bear understands things like weight-distribution and levers, and would clearly use that to lay open the shark like a can of sardines.