Marmorkrebs or marbled crayfish are parthenogenetic crayfish that were discovered in the pet trade in Germany in the 1990s (Scholtz et al. 2003). The location of natural populations (if any) of this species is unknown. Information provided by one of the original pet traders as to where they were obtained was deemed "totally confusing and unreliable" (Vogt et al. 2004). Nevertheless, Marmorkrebs appear to be closely related to North American crayfish in the genus Procambarus that are sold as pet… (More on Marmorkrebs)