The Scorpion-Tailed Spider has an impressive degree of sexual dimorphism in particular the females averaging 16 mm but males only reaches an average length of 2 mm and the astonishing tail is only seen on the females.
This tail can be arched over their heads from behind into a scorpion-like position. It also increases in size with each molting. Though the adults are usually brown to cream the juveniles of the impressive frequently display brighter colors such as pinks, reds, and yellows.
Fun fact: The tail, though distinctive, remains harmless, and plays no role in hunting. It does, however, move it in a manner similar to a scorpion, as a deterrent to predators.