STONY BROOK - A Suffolk man who was nearly killed by a shark while vacationing in the Bahamas says he now spends most of his time trying to protect the creatures. Krishna Thompson lost his leg and had to pry the shark's mouth open with his hands in the attack 11 years ago. But he says saving sharks is what he was meant to do. Several species of shark are in danger of becoming extinct because they're hunted and killed for their fins, the main ingredient in the Asian delicacy shark fin soup. Thompson helped scientists collect samples of shark fin soup from restaurants throughout the city. Researchers at Stony Brook University then extracted DNA from the soup to figure out which species were being hunted. The researchers say they found about 11 different species, some that are in serious trouble around the world. Thompson says he's also been lobbying lawmakers to ban shark-finning altogether. The shark fin soup study will be mentioned on a program during the Discovery Channel's Shark Week next Wednesday.To watch the full interview with Krishna Thompson, click on iO Extra on Channel 612.