The fearsome great white patrols the shores off more than 50 percent of the world's inhabited coastlines.Dicovery Channel - Tuesday, July, 28, 2009, 9:28 PM

A great white shark leaps out of the water to seize an imitation seal towed as a lure in False Bay, South Africa.Discovery Channel/SeaPics.com - 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

Ex-Marine Charles Ingram prepares to dive on "Great White Appetite."Discover Channel/Arom Starr-Paul - Tuesday, July, 28, 2009, 9:28 PM

A lemon shark eats bait used to lure them for the cameras.Discover Channel/Caterina Gennaro - Tuesday, July, 28, 2009, 9:28 PM

This great white, off Guadalupe Island, Mexico, has a bloody nose.Discover Channel/Caterina Gennaro - Tuesday, July, 28, 2009, 9:28 PM

A sand tiger shark is silhouetted under a boat.Discover Channel/Caterina Gennaro - Tuesday, July, 28, 2009, 9:28 PM

Lemon sharks group together.Discover Channel/Caterina Gennaro - Tuesday, July, 28, 2009, 9:28 PM

A lemon shark is spotted during a night dive.Discover Channel/Caterina Gennaro - Tuesday, July, 28, 2009, 9:28 PM

A lemon shark patrols just under the water's surface.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

"Survivorman's" Les Stroud (left) takes a dive on "Deadly Waters."Discover Channel/Caterina Gennaro - 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

Actors investigate a fake shark during a scene from "Blood in the Water."Dicovery Channel/Yoray Liberman - Tuesday, July, 28, 2009, 9:28 PM

A great white shark sinks his teeth into a decoy off southern Australia.Discover Channel/Caterina Gennaro - Tuesday, July, 28, 2009, 9:28 PM

Louise Vansant, played by Annabel Wright, realizes that her brother Charles is in trouble.Discover Channel - Tuesday, July, 28, 2009, 9:28 PM

Actors re-enact a 1916 shark attack for "Blood in the Water."Dicovery Channel/Yoray Liberman - Tuesday, July, 28, 2009, 9:28 PM

A white shark breaches in an attempt to catch its prey.Discover Channel/Caterina Gennaro - Tuesday, July, 28, 2009, 9:28 PM

Sharks gather in great numbers.Discover Channel - Tuesday, July, 28, 2009, 9:28 PM

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

A shark attacking a boat is caught on camera.Discover Channel - Tuesday, July, 28, 2009, 9:28 PM

Just some of the equipment needed to study sharks in their natural habitat.Discover Channel - Tuesday, July, 28, 2009, 9:28 PM

A shark closes in on a boat.Discover Channel - Tuesday, July, 28, 2009, 9:28 PM

A great white rises to the surface.Discover Channel - Tuesday, July, 28, 2009, 9:28 PM