3-Headed Shark Attack (2015)

A huge shark mutated by pollution in the Pacific's floating garbage attacks an ocean research facility, killing most of the staff and leaving a handful of survivors, among them a young researcher played by Karrueche Tran, desperate to get off the water. They are picked up by a party boat full of students, which turns out to be just another buffet for the creature, and a gruff boat captain played by Danny Trejo joins the hunt. Making things worse, when one of the heads is damaged the shark simply grows another. This is a monster movie that knows exactly how silly it is, made as a follow-up to 2-Headed Shark Attack and later followed by 5-Headed Shark Attack. Former wrestler Rob Van Dam plays a tough survivor, and the film leans on gore, bikinis and over-the-top kills rather than logic.