Frankenfish

"The Louisiana Bayou can be a dangerous place, but it's not just the gators that you need to watch out for anymore! When a series of horribly mutilated bodies are discovered along the river bank, authorities soon discover that a school of gigantic genetically engineered fish have found a new home in the previously calm waters. In addition to having a hearty appetite for human flesh, these powerful fish have been crossbred with a deadly snake -- giving them the terrifying ability to stalk their prey in and out of the water. When these man-eating mutants can stalk man in his natural environment, it's only a matter of time before humans move one step down on the food chain."