The 8 Most Terrifying Diets in the Animal Kingdom

Eyeless, limbless and wormlike, the Ommatokoita is a crustacean, related to lobsters and shrimp, though we're pretty sure it doesn't taste as good with warm butter. Most of its cousins actually work for a living, scavenging the ocean floor, but Ommatokoita is the lazy bum of the crustacean world, as it craves only one horrible, horrible thing.

Ommatokoita feeds off the eyeballs of the Greenland shark, a shark so badass it will eat a goddamned polar bear. The parasite burrows itself into the shark's eye and then just anchors itself there, drinking delicious eye-jelly. It sits there, eating eyeball, for the rest of its life. Just more proof that the ocean is literally made of horror.

Luckily for the Greenland shark, it doesn't actually need eyes to hunt -- it's just that badass. Extra lucky, because almost all Greenland sharks have hell-shrimp in their eyes. Some scientists have postulated that the parasites may attract prey to the shark like symbiotic fishing lures. That's right -- the shark finds itself in a situation where bugs are eating its eyeballs forever and manages to benefit from it.

During winter months, terror vomit can account for up to 95 percent of a skua's diet, making it the only thing in nature with grosser eating habits than Guy Fieri. Of course, if the victim doesn't have anything to throw up, the skua will eventually get sick of trying to scare it and will simply kill and eat the bird. Thankfully, schoolyard bullies don't take their tips from the animal kingdom.

Though they look like earthworms, these burrowing animals are actually amphibians, like frogs and salamanders, though unlike many other amphibians, the females build a nest where they dutifully protect their babies until they're large enough to fend for themselves. So dutifully, in fact, that they never even leave them to look for food, having evolved an alternative as heartwarming as it is nauseating.

Every three days, baby caecilians employ specialized, temporary fangs to strip the skin from their mother's body and feast upon it.

Luckily (or horrifically, depending on how you look at it), the caecilian mother has the rejuvenation skills of Wolverine. So she can look forward to weeks of tiny worm monsters cannibalizing her again and again and again. At this point we forget whether we're writing an article about animals or Dante's Inferno.

Moms of the world, before you bitch at your kids about everything you sacrificed to make them happy, consider for a moment whether you would have let them gnaw your boobs off over and over. Yeah, we didn't think so.

Your typical colony of ants is literally one big, happy family. Unless, of course, we're dealing with the Madagascan genus Adetomyrma, who in any other country would have insect social services busting down their doors. They would be like, ladybugs or something, with little warrants written on buttercup petals.

Members of Adetomyrma are also known as Dracula ants and have been called a "missing link" between ants and their close cousins, the wasps. To other insects, this is like being chased by the missing link between wolves and grizzly bears. You can already tell this only gets more horrible.

Not only do these unholy ant/wasp monstrosities murder you and feed you to their children, they then slice their own children open and suck your liquefied remains right back out of their guts. If a species that eats its own kids makes you think evolution forgot to carry the 1 at some point, then don't worry -- like their namesake, Dracula ants drink just enough blood to keep their victims alive and wriggling, to eventually turn into vampires themselves and continue the cycle of abuse.

Scientists call it "non-destructive cannibalism," but we like to call it "evidence that hell is right here on Earth and it's called Madagascar."

On four of the Galapagos islands, the sharp-beaked ground finch leads a fairly normal little birdy life of eating bugs all day, but on the two barren, rocky islands of Darwin and Wolf, the same finches have diverged into a ghastly subspecies nicknamed the vampire finch, which wields razor-sharp peckers to feast on boobies (we're still talking about birds).

Vampire finches depend on fresh blood for protein and moisture during long droughts, and the boobies have so adapted to this horror that they barely even give a shit when they start getting beak-stabbed by the blood drinkers. The finches, you see, are really just the Biff Tannens of the bird world, and all the other animals have just had to learn to cope with the assholes.

When they're not actually pecking holes in other animals, the vampire finches supplement their diet by eating bird poop, as well as pecking the feathers off booby chicks and even pushing booby eggs out of their nests to smash them on rocks. They probably also trash hotel rooms and steal candy from babies.

Nicrophorus pustulatus engages in the "normal" corpse-burying ritual of its cousins, but whenever possible, it prefers to raise its young on a wholesome diet of embryonic snakes. If she can find a snake nest with eggs, the mommy beetle lays her own eggs near them, and the larvae tunnel into the unborn reptiles, eat them alive and use the eggshells as their own protective nursery. We're pretty sure there's a horror movie somewhere that tried to use a scaled-up version of this plot but was canned for being way, way too horrible.

This kind of predatory stealth abortion makes the female pustulatus what is commonly known as "a psychotic bitch," or in scientific terminology, a "brood parasitoid." And while it's a tactic shared by many other insects, this is the first known case of an insect parasitizing the brood of a vertebrate. And in the never-ending horror show that is the animal kingdom, we can only assume that snakes are just the beginning.

In case you haven't heard, whales are big. The carcass of a whale weighs over 200 tons and takes months or even years to completely decompose. In the perpetual, freezing blackness of the deep sea abyss, a whale dying is like a zeppelin full of Big Macs crashing over Ethiopia. Entire ecosystems have evolved for the singular purpose of making sure no part of that whale goes to waste, not even its bones.

Forming over a whale corpse into what looks like pink fuzz are the countless tentacles of Osedax mucofloris, a relative of worms and leeches whose Latin name translates as "bone-eating snot-flower." We're not kidding.

Their microscopic eggs drift like spores in the deep ocean, lying dormant until the day they bump into recently exposed whale bone. On contact with the gigantic skeleton, they take root like plants, drilling into the bone with a network of fleshy tendrils.

Completely lacking mouths or digestive tracts, the worms depend on symbiotic bacteria to break down the fatty oils contained within bone, so technically, they don't so much eat bone as eat the poop of something inside of them that eats bone. That's right: Nature found a way to make the bone-eating process even more disturbing.

You impressed us once again, Nature.

For more species that need to be eradicated immediately, check out 6 Animals Humanity Accidentally Made Way Scarier and 13 Real Animals Lifted Directly Out of Your Nightmares.

We aren't through terrifying you yet. There's more horror in our bestselling book.

And stop by Linkstorm for some fluffy bunnies.

And don't forget to follow us on Facebook and Twitter to get sexy, sexy jokes sent straight to your news feed.

Do you have an idea in mind that would make a great article? Then sign up for our writers workshop! Do you possess expert skills in image creation and manipulation? Mediocre? Even rudimentary? Are you frightened by MS Paint and simply have a funny idea? You can create an infograpic and you could be on the front page of Cracked.com tomorrow!