Hydra (2009) on Netflix

Plot summary

Dr. Valerie Cammon, an archaeologist, and Dr. Kim, her colleague, sail to a remote volcanic island in the Mediterranean, where Cammon searches a cave for relics. A seaquake sinks the ship. Two months later, Vincent Camden and Dixie Camden arrange a hunt in which wealthy clients stalk human prey, and their captain, who knows nothing of the Hydra, offers the same island as the site. Former Marine Tim Nolan is kidnapped along with three ex-convicts, Gwen Russell, Bob Crick and Ronnie Kaplan, and the four are marooned on the shore with a twenty-four hour headstart. The hunters arrive the next day, having been told that their targets are criminals.