Majungasaurus:-

Meaning the lizard of mahajangas these lizards resided in Madagascar from 70-66 million years ago. These were carnivores and were extremely medium sized lizards. It could measure up to 20-23 ft, in length and about 1,100 kilograms i The most important reason why these made up to this list is because of one quality any species hate in themselves, and that is being a cannibal. These not so big physically monsters were definitely destructive with a sweet tooth for its own kind.