Cannibals

A person or thing that eats something that is the same species as it is. The circumstances that turned a villain into a cannibal vary, ranging from lack of food to mutation that altered their diet. Cannibals are often depicted as being particularly depraved, due to simply devouring a member of their own species.

NOTE: Not to be confused with Man-Eaters who are non-human villains who eat humans. Also, do not add animals who eat other, different animals (like a T-Rex eating a Triceratops), no matter how anthropomorphic they may be.