At CITES, the Convention on International Trade of Endangered Species, representatives from 175 countries will focus on the necessity of developing management plans for marine animals, including the bluefin tuna and eight species of shark. Sharks are routinely hunted for their fins, which are used as a delicacy in shark fin soup. Stony Brook University professor Demian Chapman does DNA research to identify shark species and geographic origin. He tells host Jeff Young why it’s important to regulate international trade of sharks.