In this Sept. 7, 2012, photo, Ocearch expedition leader Chris Fischer steps 

In this Sept. 7, 2012, photo, Ocearch expedition leader Chris Fischer steps onto a small sport fishing boat to check chum locations for signs of great white shark activity in the Atlantic Ocean off the coast of Chatham, Mass. The Ocearch team baits the fish and leads them onto a lift, tagging and taking blood, tissue and semen samples up close from the world’s most feared predator. The real-time satellite tag tracks the shark each time its dorsal fin breaks the surface, plotting its location on a map. (AP Photo/Stephan Savoia)
Associated Press
In this Sept. 7, 2012, photo, Ocearch expedition leader Chris Fischer steps onto a small sport fishing boat to check chum locations for signs of great white shark activity in the Atlantic Ocean off the coast of Chatham, Mass. The Ocearch team baits the fish and leads them onto a lift, tagging and taking blood, tissue and semen samples up close from the world’s most feared predator. The real-time satellite tag tracks the shark each time its dorsal fin breaks the surface, plotting its location on a map. (AP Photo/Stephan Savoia)
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