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 geryi is a species of piranha endemic to the Tocantins River basin in Brazil. Although present in the aquarium trade in the United States, S. geryi is rare and expensive to purchase. Possession or trade of piranhas is illegal in a number of States. No introductions of S. geryi have been reported outside its native range. The history of invasiveness is uncertain. Climate match to the contiguous United States was low. Due to lack of information, the certainty of assessment is low. The overall risk assessment category for S. geryi is uncertain.