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.
Batissa violacea, the Violet Batissa, is a freshwater mollusk species that is native to the Western Central Pacific (Brunei Darsm, Indonesia, Malaysia, Philippines, Singapore, Timor-Leste, Australia, Fiji, Palau, Papua New Guinea, Solomon Islands, and Vanuatu). This species is not found in the aquarium trade, but the shells of individuals can be purchased. B. violacea is also utilized locally as a food source within its native range. Since no records of introductions outside of its native range were found, the history of invasiveness is classified as No Known Nonnative Population. The overall climate match for the contiguous United States was medium, with areas of high and medium match in the west and southeast coastal areas. The certainty of this assessment is low due to limited information available regarding the history of invasiveness of B. violacea. The overall risk assessment category for Batissa violacea is Uncertain.
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Uncertain Risk
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