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 altispinis is a species of piranha native to the Amazon River basin of South America. It appears in the aquarium trade internationally. Many U.S. States have placed restrictions on piranha possession or trade. S. altispinis has not been reported as introduced outside its native range, so the history of invasiveness is uncertain. Climate match to the contiguous United States is low overall, with medium match occurring in southern Florida. Due to lack of information about potential impacts of introductions, the certainty of assessment is low. The overall risk assessment category for Serrasalmus altispinis is uncertain.