The blue crayfish (scientific name Procambarus alleni, sometimes called the electric blue crayfish, the sapphire crayfish, or the Florida crayfish) is a species of freshwater crayfish endemic to Florida in the United States. 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.[2] It is included on the IUCN Red List as a species of Least Concern. The blue crayfish is frequently kept in freshwater aquaria.[3] In the wild, this species varies from brown-tan to blue, but the aquarium strain has been selective bred to achieve a brilliant cobalt blue color.
