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 compressus is a species of piranha native to the Amazon River basin in South America. The species is present in the aquarium trade in the United States. However, many States prohibit possession or trade of piranhas. No introductions of S. compressus have been reported outside its native range. The history of invasiveness is uncertain. Climate match to the contiguous United States is low overall, but climate match is high in southern Florida and medium in parts of Texas and Louisiana. Due to lack of information, the certainty of assessment is low. The overall risk assessment category for Serrasalmus compressus is uncertain.