Silent Venom(2009)

The greatest danger to the mission is already on board.

Silent Venom is a creature-thriller that traps an American submarine crew in a nightmare scenario. When two scientists board the vessel with a cargo of venomous snakes, the confined underwater setting becomes a pressure cooker of terror. The crew must navigate hostile territorial waters while containing a deadly biological threat that could kill them all. As the snakes escape into the cramped corridors, paranoia and panic spread faster than the venom itself. The film combines claustrophobic submarine warfare with creature-horror elements, forcing the crew to choose between external military threats and the lethal danger slithering through their own vessel. Survival depends on outsmarting both enemies—the ones waiting outside and the ones loose within.