Ecological Risk Screening Summary - New Guinea Apricot Crayfish (Cherax holthuisi) - 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 holthuisi is a New Guinean crayfish known only from its type locality. It is traded in several countries, including the United States, as part of the aquarium industry; wholesale availability is reported to be common in parts of Europe. Cherax holthuisi has a low climate match to the contiguous United States and there is no history of introduction. Florida and Washington prohibit possession or trade of C. holthuisi. The overall risk assessment is uncertain because of the lack of information on impacts of introduction and the low climate match.