The Naked Mole Rat
This disgusting beast probably won't attack you, nor will it sting you, bite you, or claw you. No, this creature is a monster purely by virtue of its overwhelming, butt-ugliness. Thankfully, it's an underground dweller, so chances are the only opportunity it will ever have to gross you out is right now. Behold it in all it's god-awful, wrinkly, buck-toothed glory!