Ecological Risk Screening Summary - Twospot astyanax (Astyanax bimaculatus) - Uncertain Risk

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.

Astyanax bimaculatus is a freshwater fish native to South America. It consumes zooplankton, detritus, plant material, and fish scales. Numerous parasites have been recorded on the species. It has not established outside of its native range, although it is in limited trade as an aquarium fish. The history of invasiveness is not documented. There were no records of Astyanax bimaculatus introduced into the wild. The climate match for the contiguous U.S. was medium. The uncertain history of invasiveness and low certainty of this assessment lead to an overall risk category of uncertain.