(Faxon, 1884) 
Procambarus alleni is a species of freshwater crayfish endemic to Florida. Its natural range is the area east of St. Johns River and all of Florida from Levy County and Marion County southwards, as well as on some of the Florida Keys. It is widely sold in the aquarium trade under a variety of names, including the blue crayfish or electric blue crayfish. It is included on the IUCN Red List as a species of Least Concern.This Blue Cray Fish is also referred to as the Florida Cray. .
- "Procambarus alleni". Integrated Taxonomic Information System. Retrieved October 10, 2010.
- K. A. Crandall & J. W. Fetzner (May 17, 2003). "Procambarus (Leconticambarus) alleni (Faxon, 1884)".
- K. A. Crandall (010). "Procambarus alleni". IUCN Red List of Threatened Species. Version 3.1. International Union for Conservation of Nature. Retrieved October 10, 2010.
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