What causes a shark feeding frenzy?

The lure of a free meal might be enough for us to throw an elbow or two as we battle for the last slice of pizza. Compared to sharks though, our feeding frenzies are tame.

A shark feeding frenzy occurs when a number of sharks fight for the same prey. Sharks are usually solitary diners, and a feeding frenzy indicates why that might be. To an observer, it looks like the sharks lose their mind… » Full Story on HowStuffWorks