Species that are considered high risk have a well-documented history of invasiveness in at least one location globally, and a high or medium climate match to the contiguous United States.
C. chinensis is a large snail native to Southeast and East Asia that is now established in many locations across the U.S. C. chinensis has been shown to depress or exclude populations of native snails locally and to alter bacterial community composition. Synergistic negative effects have been observed on native snails when both C. chinensis and invasive crayfish are present. The species can also clog water intake pipes and be a nuisance on lakeshores. C. chinensis is a common aquarium species, is consumed by humans, and can be transported accidentally by overland transport of boats, so the risk of spread is high. Climate match to the continental U.S. is high. Overall risk posed by this species is high.
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High Risk
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