his name is mike rutzen, and in south africa, where he lives, he's known simply as "the sharkman." hese predators will surprise you. far from being mindless killing machines, rutzen believes great whites are smart, curious, and not out to kill humans. and as we reported back in 2009, he's willing to risk his life to prove it. mike rutzen is looking for a great white shark he can swim with-- that's right, swim with. before he gets in the water, he needs to find a great white that is both calm and curious, a shark he refers to as a "player." >> mike rutzen: that's a player. >> cooper: what's a player? >> rutzen: well, a player is basically the shark that's so relaxed, has a nice personality, woke up on the right side of the reef, and it's... >> cooper: "on the right side of the reef." >> rutzen: yeah. ( laughs ) and the animal's willing to interact with us, it's so curious. >> cooper: rutzen says great whites have personalities. they may be the top predator in the sea, but he says they are not the man-eating killers of our nightmares. now, how can you tell that's a player? >> rutzen: