In this Thursday, July 16, 2015, photo, Galapagos sharks huddle in the ocean during a shark viewing expedition with Hawaii Shark Encounters off Oahu's North Shore. Sharks are drawn to this locale by strong, converging currents where cooler water upwells and nutrients tend to be more abundant, attracting fish. (Jamm Aquino/The Honolulu Star-Advertiser via AP) **FILE**
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