The following bit of shark footage comes from a few guys who were doing a spot of fishing in a kayak near the outflow pipe of a nuclear power plant that they obviously live near. They manage to snag a pretty decent sized 4 foot black tip shark, but before they can take some decent pics for their Facebook account an even larger bull shark arrives out of nowhere and bites the smaller shark in two, before swallowing it up whole.
Damn. Do you reckon the bull shark had been mutated by nuclear radiation, turning it into a super killer shark? Probably not, but it does make for an even better story. Definitely survival of the fittest.