Ya know my son tried the same thing at his age, "Why do I have to eat the other creatures dad? What's so important about the food chain?"
~ Creature
You know the thing about sharks, he's got...lifeless eyes, black eyes, like a doll's eye. When he comes at ya, doesn't seem to be living. Until he bites ya and those black eyes roll over white. And then, ah then you hear that terrible high pitch screaming and the ocean turns red and spite of all the pounding and the hollering they all come in and rip you to pieces. You know by the end of that first dawn, lost a hundred men! I don't know how many sharks, maybe a thousand! I don't know how many men, they averaged 6 an hour.
~ Quint about The Shark
Predators are carnivorous animals who hunt and kill prey for food. Examples of predators are bears, hyenas, big cats, birds of prey, frogs, wolves, sharks, snakes, crocodiles, killer whales, and even dinosaurs.

Typically, predators in real life and fiction act out of instinct and a need to eat rather than genuine maliciousness; thus, they are almost always considered amoral or feral.

*NOTE: this category should never be mistaken by human predators, who suffer from pedophilia, this category is for creatures who have to eat other creatures in order to live, a animalistic predator.

Since these villains kill to survive and not for maliciousness, they are rarely Pure Evil, but it's possible for them to be Pure Evil if they are cruel to their victims and they would torture them before killing them (e.g. Other Mother and Dag). Even though Dag definitely needs food, considering how skinny he is, he acts like a serial killer and likes psychologically abusing his prey.