Life in the World's Oceans. Episode 11, Sharks and RaysLife in the World's Oceans. Episode 11, Sharks and Rays

Fish certainly have good reason to fear these top-of-their-game predators, with their multiple rows of teeth and ability to detect electrical current better than any other animal. But while four species have been known to assault humans with no provocation, almost 99 percent of the many hundred shark species would rather…