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Red Swamp Crayfish, Procambarus clarkii


Short description of Procambarus clarkii, Red Swamp Crayfish

The red swamp crayfish is dark red, covered in bright red spots and has a black wedge-shaped stripe on the top of the abdomen. Adults reach 85-90mm total length and are aggressive in behaviour.

Description of Procambarus clarkii, Red Swamp Crayfish status in GB

Several isolated, but well-established populations of the red swamp crayfish can be found in England. Little spread to other areas of England and no populations yet recorded in Wales or Scotland.

Habitat summary: Procambarus clarkii, Red Swamp Crayfish

Red swamp crayfish populations are currently found in ponds, ditches, canals and rivers in the UK but are tolerant to a wide range of environmental conditions. They can withstand changes in water flow, drying out and salinity, so inundated wetland, reed bed, drainage channels and coastal marshes may also be suitable habitat.

Overview table

Environment: Freshwater
Species status: Non-Native
Native range: Southeastern U.S.A., Mexico
Functional type: Omnivore
Status in England: Non-Native
Location of first record: Hampstead Heath
Date of first record: 1991

Distribution map

Map of the UK with areas shaded to show the UK distribution of Red Swamp Crayfish

GB Distribution from NBN Atlas

Author's name:

David Aldridge

Last updated:

October 4th 2019

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