It is a large, heavy scorpion with a black coloration. It emits a fluorescent glow when under ultraviolet light. It is an arthropod and therefore has an exoskeleton - an external skeleton that supports and protects an animal's body. Scorpions differ from other arachnids by having long palps, in addition to the characteristic long and dangerous tail, which ends in a needle, and it is through this sting that the scorpion inoculates its venom.