The recent spate of attacks — seven since June in North Carolina alone — has little to do with the shark population off American coastlines. Shark attack, George Burgess says, "is driven by the number of humans in the water more than the number of sharks." Carol Buchanan/iStockphoto hide caption

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The antenna trailing off the diver's foot is there to ward off sharks by creating an electromagnetic field that sharks are sensitive to. Unlike fish snagged with the diver's spear gun, sharks warded off by the Shark Shield remain unharmed. Courtesy of Shark Shield hide caption

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Robert Shaw (from left), Roy Scheider and Richard Dreyfuss play a shark hunter, a police chief and a marine biologist in 1975's Jaws. Universal/Kobal Collection hide caption

toggle caption Universal/Kobal Collection