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. This additional information will help inform decisions on where, when, and how the species may be used to minimize risks of them becoming invasive.
Cherax rotundus is a crayfish species native to northern Victoria, Australia. No introductions of this species have been reported, so potential impacts of introduction to the United States. However, one paper reports high intraspecific and interspecific aggression by this species. The States of Florida and Washington have judged the risk to be great enough to prohibit possession, transport, and trade of the species within the respective states. Climate match of C. rotundus to the contiguous United States was low, with medium matches occurring in parts of the West. Overall risk posed by C. rotundus to the contiguous U.S. is uncertain.
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Uncertain Risk
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