Found throughout West Africa, the Emperor is one of the largest species of scorpion on the planet, growing up to 8 in. long. Its fat black stinger and claws make the Emperor look fierce, but appearances can be deceiving these arachnids are actually pretty docile. In fact, they're just about the only monsters on this list that are commonly kept as pets albeit by the sort of people who own scorpions as pets. If for some reason that includes you, here's a tip: Emperor scorpions like crickets, mealworms and the occasional pinkie mouse.