Curples are purple Tribble-like creatures that were the creation of Stankfoot, to menace New Eden City, in the episode Which Came First? Initially they where the mutated nursing eggs from Ronson High's parenting class, but when they started to multiply, they became instantly popular pets. Obviously ignoring the curse about birth-control, their numbers got way out of hand, and then they ran a muck when Stankfoot activated their aggressive side. In their feral state, they are larger and sport an evil toothy grin. There name is a combination of "cute" and "purple".