Suspense Movie - Shark.Night.2011

College friends Nick, Beth, Malik, Maya, Blake and Gordon are invited by their friend Sara Palski to spend the weekend at her saltwater lake house in Louisiana. They stop at a bar to buy supplies and Malik has some friction with the rednecks, Red and Dennis Crim, but Sara resolves the situation since Dennis is her ex-boyfriend. Then the group meets another friend of Sara, Sheriff Greg Sabin. When Malik is skiing in the lake, he has an accident resulting in having his arm severed by a shark and his friends trying to seek help. Instead, they learn that the lake is infested with several different species of sharks, and they have more dangerous problems threatening them.