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.
The Gibbus Piranha (Serrasalmus gibbus) is native to the Tocantins River basin in eastern Brazil. It has also been reported from other parts of the Amazon River basin and from French Guiana and the adjacent Brazilian state of Amapá. No introductions of this species have been reported, but identification in the native range as well as any potential introduced range may be difficult given the morphological similarities among many serrasalmids. S. gibbus is present in the aquarium trade in the United States, but many States prohibit the possession or trade of piranhas. The history of invasiveness is uncertain. Climate match to the contiguous United States is low overall, with medium match occurring only in southern Florida. Due to lack of information and taxonomic uncertainty, the certainty of assessment is low. The overall risk assessment category for S. gibbus is uncertain.
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Uncertain Risk
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