Ecological Risk Screening Summary - Restricted Gilgie (Cherax crassimanus) - Uncertain Risk

Species that are considered uncertain risk need a more in-depth assessment beyond the Risk Summary to better define the species’ risk to U.S. environments.

Cherax crassimanus is a small crayfish in the family Parastacidae. It is native only to southwestern Australia and has not been reported as introduced elsewhere. C. crassimanus has a low climate match to the contiguous U.S. overall, but medium to high match to parts of California, Oregon, and Washington. With the lack of a history of introductions, further information is needed to determine the risk posed by C. crassimanus to the contiguous U.S. The Florida Fish and Wildlife Conservation Commission and the Washington Department of Fish and Wildlife have listed the crayfish C. crassimanus as a prohibited species. The overall risk posed by this species is uncertain.