Sharks get a close-up look at the humans who are looking to get a closer look at them.Discover Channel - Tuesday, July, 28, 2009, 9:28 PM

Andy Dehart hand-feeds a lemon shark.Discover Channel/Caterina Gennaro - Tuesday, July, 28, 2009, 9:28 PM

"Survivorman's" Les Stroud (left) takes a dive on "Deadly Waters."Discover Channel/Caterina Gennaro - Tuesday, July, 28, 2009, 9:28 PM

Divers hand-feed a lemon shark. Discover Channel/Caterina Gennaro - Tuesday, July, 28, 2009, 9:28 PM

Sharks fill the water, drawn by presence of chum.Discovery Channel - Tuesday, July, 28, 2009, 9:28 PM