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.
Rhinogobius brunneus, Amur Goby, is a small, amphidromous fish species native to Japan and coastal areas of East Asia. This species has varied physical and life history traits, and may represent a species complex. R. brunneus has been introduced outside of its native range in the Pacific Northwest and the Middle East, but no negative impacts of introductions of this species have been documented. Introductions are believed to have been through ballast water or the aquarium trade. History of invasiveness is classified as “none documented.” R. brunneus has a high climate match with the contiguous United States. However, this climate match is only valid for where the species could survive in brackish or freshwater. It does not apply to saltwater environments where some juvenile stages develop. Because of the taxonomic uncertainty of this species and the lack of impacts of introductions from which to base a risk assessment, certainty of this assessment is low. The overall risk assessment category is Uncertain.
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Uncertain Risk
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