They are extremely carnivorous, to the point of cannibalism. However, they have little intelligence as they often throw themselves onto dry land in attempts to eat smaller organisms. Once they reached the size of nuclear submarines they are inexplicably invulnerable to nuclear weapons. They are defeated when they are tricked into eating each other. The Mega Shark appeared in the 2009 movie "Mega Shark Versus Giant Octopus" and three sequels: "Mega Shark Versus Crocosaurus", "Mega Shark Versus Mecha Shark" and "Mega Shark vs. Kolossus". This 1500-foot megalodon was fighting with a Giant Octopus until they were flash-frozen in an iceberg. After being released from the ice the shark rampages across the Pacific. It fought the Giant Octopus and, in the sequels, the Crocosaurus, Mecha Shark, and Kolossus. In the second movie, the Megalodon is revealed to be female and in "Mega Shark Versus Mecha Shark", the Megalodon was male. She has a difficult time using her senses in low light areas, due to the tumor in her brain. The Megalodon is criticized for its rapid stress changes throughout the films, as well as the films' outlandish plots. The 2-Headed Great White Shark appeared in the 2012 movie "2-Headed Shark Attack". It is a naturally mutated great white shark with two heads that lived to its adult stage estimated around 40 feet in length. The 2-Headed Great White Shark feeds on the likes of giant squids and megamouths. It also possesses great strength as it used its body to sink an atoll on a coral reef and survived a dynamite sized explosion that took off its left head. This shark is noted to not only have twice the sensory power of a normal great white, but also can maneuver in waters as shallow as four feet deep and presumably has an extremely high metabolism as it consumed twenty-one humans within the course of several hours. The design for the 2-Headed Great White Shark was created by Cleve Hall and his family as seen in the "Monster Man" episode "Seeing Double." It was originally supposed to have the heads on top of each other, but Cleve Hall pushed to change the design. The 3-Headed Great White Shark is an advanced version of the above creature in the 2015 sequel "3-Headed Shark Attack" where it sports three heads. The 5-Headed Great White Shark is another advanced version of the 2-Headed Great White Shark in the film "5-Headed Shark Attack" where it sports five heads in the front and a sixth head at the tip of its tail.