There are over 1,500 animals that eat their own kind. They come in all sizes and shapes. From the praying mantis to the polar bear. Cannibal animals eat to survive, possibly because of global warming. To keep their population in check. To get a healthy snack. To show another animal who's boss. And to ensure the perfect mate.
Some of the scariest creatures in nature can take over the minds of others. That's how they get what they want. Their victims are zombie creatures.