A guy snorkeling in Honolulu was bitten on the leg by a Tiger Shark not a great way to start a vacation. He was snorkeling looking for turtles when an eight foot shark took a bite out of him. Two partially eaten turtles were found washed ashore. Just a tip for snorkelers. If you find partially eaten turtles on shore there is a pretty good chance something is preying on them. I would turn around and head for the pool.

http://www.orlandosentinel.com/news/nationworld/sns-ap-shark-attack,0,3552001.story?coll=orl_tab01_layout