Ecological Risk Screening Summary - Japanese White Crucian Carp (Carassius cuvieri) - 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.

Japanese White Crucian Carp (Carassius cuvieri) are native to Lake Biwa in Japan. C. cuvieri has been introduced deliberately and unintentionally outside of its native range in Japan, China, Korea, and Ethiopia. Established wild populations have resulted from these introductions. It is used as a food fish and sport fish in both the native range and the introduced range. C. cuvieri can be an intermediate host for Clinostomum complanatum which then infect humans. The history of invasiveness is None Documented. There is some information on impacts of introductions but the information is not conclusive. It was introduced into Korean freshwaters and may have resulted in a reduction of the native goldfish, Carassius auratus. The climate match is high. Areas of high match area spread out across the east of the contiguous United States and in small areas along the Pacific Coast. The certainty of assessment is medium. The information on impacts of introduction is not of a high enough quality or quantity for the certainty to be classified as high. The overall risk assessment is uncertain.