fish01-sharktagging_03_custom-81faeec9812ee4ab15b876dcafcf2d282f82737e-s40

Shark charter operator Art Gaeten (right) and recreational shark fisherman Shawn Knowles struggle to hold a blue shark in position while shark biologist Anna Dorey attaches a satellite tag to its back. Researchers say about five blue sharks are caught for every one swordfish. Scientists are trying to determine what happens to the sharks after they are released.