Procambarus (Scapulicambarus) clarkii* (Girard 1852)
(red swamp crayfish)
 

Procambarus clarkii (photographed by Teresa Worst, NC Division of Water Quality)
 
 

General information
Distribution map
Photographs
Illustrations



National Range: “Northern Mexico to Escambia County, Florida, and north to southern Illinois and Ohio.  Widely introduced in the United States and elsewhere; Hunter (1986) recorded the following introductions: Arizona, California, Georgia, Hawaii, Idaho, Indiana, Maryland, Nevada, New Mexico, North Carolina, Ohio, Oregon, South Carolina, Belize, Brazil, Costa Rica, Dominican Republic, Island of Cyprus, Japan, Kenya, People’s Republic of China, Portugal, Spain, Taiwan, and Uganda.  It has also been introduced into Oklahoma and into Utah (Johnson, 1986:630).  Limited cultivation is in progress in Colombia, France, and Zambia, and introductions are planned or have been made in Ecuador, El Salvador, Guatemala, Honduras, Nicaragua, Venezuela, and Zimbabwe” (Hobbs Jr. 1989); many other nations (escapees from aquaculture facilities)

NC Physiographic Region(s): piedmont and coastal plain (Cooper et al. 1998, Fullerton and Watson 2001)

River Basin(s): Broad, Yadkin-Pee Dee, Lumber, lower Cape Fear, Neuse, Tar-Pamlico, Pasquotank

Adult Habitat: “lentic and lotic situations and burrows (tertiary burrower)” (Hobbs Jr. 1989); “in its native range this species prefers growths of aquatic vascular plants or leaf litter; tertiary burrower” (Bouchard 1974); “sluggish streams and lentic habitats, swamps, ditches, sloughs, ponds, etc. especially in vegetation, leaf litter, etc.; secondary burrower” (Williams and Bivens 1996); in backwater or swampy areas of reservoirs

Juvenile Habitat: along edges in vegetation

Reproductive Season: winter??

Species associates: C. latimanus, C. reduncus, C. diogenes, C. sp. C, F. fodiens, and P. acutus, others?

Conservation status:  Nonindigenous (non-native) species in North Carolina

Identification references: Cooper 1998, 1999, Hobbs Jr. 1989, Hobbs 1991

Taxonomic Description:

body shape: cylindrical, very large animal
coloration:  normally red; some in shades of brown; blue morphs exist; chelae with bright red tubercles
spines: strong cervical, cephalic, branchiostegal, and marginal spines
rostrum: long; with marginal spines
areola: linear
chelae: notch in proximal portion of dactyl, leaving gap and delimited by tubercle (giving the chela an s-shaped appearance); large tubercle opposite end of gap on fixed finger; large scarlet tubercles on the palm and fingers
other characteristics: n/a
form I male gonopod: setae arising from punctations at the base of the central projection; prominent shoulder on the distocephalic surface (appearing in lateral aspect as large, rounded plate)
Notes:  likely introduced either via bait-bucket or as an aquarium or aquaculture escapee; widely introduced throughout the U.S. and in other parts of the world; blue specimens found to be sold in aquarium stores; may compete with native species

Glossary
Conservation Status
References

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