See related story: Rare-Earth Magnets: Geek Toys -- And Shark Repellents?
A magnet rudely awakens a juvenile lemon shark from tonic immobility, a comatose state induced by turning it upside down.Photo courtesy of Shark Defense/Ocean Magnetics
Marine biologist Patrick Rice, of Shark Defense, tests a magnet on the end of a pole with 6-foot Caribbean reef sharks.Photo courtesy of Shark Defense/Ocean Magnetics
Juvenile lemon sharks circle in a testing pen at the Bimini Biological Research Station shark lab in the Bahamas.Photo courtesy of Shark Defense/Ocean Magnetics
Michael Herrmann of Shark Defense shows off the rigging of the magnet over the hook and bait during longline testing.Photo courtesy of Shark Defense/Ocean Magnetics
A rare-earth magnet used in longline testing is shown for size.Photo courtesy of Shark Defense/Ocean Magnetics
The SharkDefense team runs another test of its original invention, a chemical repellent based on anecdotal evidence of fishermen repelling sharks by trailing decaying shark carcasses from their fishing boats. After studying semiochemicals -- chemical messengers used by some fish to attract or repel others of their species -- the team set out to replicate the molecular chemistry of the kind of rotting meat that screams Òstay awayÓ to other sharks.Photo courtesy of Shark Defense/Ocean Magnetics
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