Silent Venom | 2008
Lieutenant Commander O'Neill and his crew are piloting a retired submarine to her new home in Asia when they're stuck transporting two researchers working feverishly on a secret military program designed to create the ultimate anti-toxin. Unfortunately, the researchers have brought along a few more passengers: Deadly snakes, including a mutated Diamondback. When the submarine is attacked, the slithering menace is accidentally freed. Now the crew finds themselves hundreds of feet below sea level and fighting for their very survival against a threat no one expected.