Author Walter Faxon (1848–1920)
Description Procambarus alleni syn. Cambarus alleni
English: Cambarus Alleni Fax. Male, form I. Hawkinsville, Fla.
Subject: Cambarus, Crayfish
Tag: Shellfish
Date 1885
Source/Photographer: Walter Faxon (1885) Review of the Astacidae, Memoirs of the Museum of Comparative Zoology at Harvard College, Vol. X, No.4, Cambridge, MA: Museum of Comparative Zoology
Source: https://commons.wikimedia.org/wiki/File:FMIB_53483_Cambarus_Alleni_Fax_Male,_form_I_Hawkinsville,_Fla.jpeg

The blue crayfish (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. The blue crayfish is frequently kept in freshwater aquaria. In the wild, this species varies from brown-tan to blue, but the aquarium strain has been selectively bred to achieve a brilliant cobalt blue color. It should not be confused with the burrowing Cambarus monongalensis, also known as the blue crayfish, but native to Pennsylvania, Virginia and West Virginia.

Order: Decapoda
Family: Cambaridae
Genus: Procambarus
Subgenus: Leconticambarus
Species: Procambarus alleni (Faxon, 1884)