Blue crayfish (disambiguation)

The blue crayfish is Procambarus alleni, of which an electric blue morph is common in aquaria.

Blue crayfish may also refer to:
 * Cherax quadricarinatus - tropical blue crayfish, or blue lobster, also common in aquaria
 * Cambarus monongalensis - Blue or Mononghela crayfish
 * Euastacus sulcatus - Blue or Lamington crayfish, from Australia

Also, three North American burrowing crayfish have 'blue' in their common name:
 * Cambarus cymatilis - Conasauga blue burrower
 * Cambarus harti - Piedmont blue burrower
 * Cambarus loughmani - Blue Teays mudbug