Sharks are usually portrayed as evil, which hurts their image. A great white shark attacks a fishing vessel in a scene from the movie "Jaws." Sunset Boulevard/Corbis Aug. 6, 2013— -- Sharks are ...

Every swimmer or surfer dreads the potential of a shark attack, and with good reason. Attacks can be fatal, and those who survive often lose limbs or leave with catastrophic injuries. The real dangers ...