Capsized, Blood in the Water. Movies where humans lose their place at the top of the food chain are always a fun ride.
This one is "based" on actual events. After I watched the movie I read up a little about the actual event and of course they did make some changes for dramatic effect. There were only two survivors out of five. One chick got injured during the boat's sinking and died from her wounds. Two other dudes drank sea water and went crazy and jumped out of the life raft and got eaten by sharks. At least that's the two survivor's story and they're stickin to it. However if those two dudes that got eaten were anywhere near as annoying as the movie made them out to be I wouldn't be surprised if the two survivors gave them a little help existing the life raft.