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.
Serrasalmus eigenmanni is a species of piranha native to the Amazon basin and Guyana Shield rivers in northern South America. The species has not been reported as introduced outside its native range, but it is present in the aquarium trade in the United States. Numerous States place restrictions on the possession or trade of piranhas. The history of invasiveness is uncertain. Climate match to the contiguous United States was low overall, with medium climate match occurring in southern Florida. Due to lack of information, the certainty of assessment is low. The overall risk assessment category for S. eigenmanni is uncertain.