The Reef (2010 film)

The Reef is a 2010 Australian horror film. The film was written and directed by Andrew Traucki, his second feature film the first being Black Water, and is about a group of friends who capsize while sailing to Indonesia. The group decides that their best bet for survival is to swim to a nearby island but they find themselves stalked by a great white shark.

With the current taking them further away from land, Luke gathers supplies from the overturned vessel with the intention of swimming to nearby Turtle Island. With the group gathered on top of the overturned hull, Warren activates the yachts EPIRB, but Luke informs him that it is an older model that requires a plane to fly overhead to receive the signal. When Luke suggests the others join him in swimming to the island which Luke estimates to be twelve miles away, Warren refuses as he believes the water is sharkinfested. With encouragement Kate, Suzie and Matt follow Luke into the water as he begins the journey.During their journey, the group find the carcass of a sea turtle that has had its head bitten off. On the overturned yacht, Warren spots a large Great White Shark circling the vessel. Soon, the group are also stalked by the same shark. It approaches them several times, even brushing past Kate, before leaving. Kate and Suzie are supported by Matt and Luke as they are both in shock. However, during the encounter, Kate lost the bodyboard she was using as a flotation device. When Matt goes to retrieve it, he is attacked by the shark and his legs are severed. He is comforted by the group, but quickly dies. As night falls, Luke, Kate and Suzie are once more stalked by the shark. Suzie blames Luke for talking the group into swimming to an island he seemingly cant find. ........

Source: Wikipedia