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.
Silver dollar (Metynnis hypsauchen) is a fish species native to the Amazon and Paraguay River basins, and north Guiana Shield rivers in South America. It is used in aquariums and has a minor value for human consumption. Metynnis hypsauchen is currently available for trade within the United States and requires careful handling due to powerful dentition that can cause serious bites. History of introductions and distribution is unclear based on review of existing literature. Members of the Metynnis genus (species uncertain) have been collected beyond their native range in Florida, where their status is listed as locally established. No confirmed introductions of Metynnis hypsauchen have been reported. The climate match with the contiguous United States is low, with a medium match only in peninsular Florida and the southern Gulf Coast of Texas. The certainty of assessment is low. Given the lack of introductions, the overall risk for Metynnis hypsauchen is uncertain.
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Uncertain Risk
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