Species that are considered low risk present a minimal risk of invasiveness because the climate where they are established is sufficiently different from the United States climate AND there is no evidence of invasiveness globally.
Harlequin Rasbora (Trigonostigma heteromorpha) is a fish native to Thailand, Malaysia and Singapore. T. heteromorpha is very popular in the aquarium trade worldwide with significant presence in trade in the United States and Europe. The history of invasiveness for T. heteromorpha is low. There are no verified records of introduction to the wild. Extrapolating just from the trade information available for the United States, there has been a trade volume of more than 76 million individuals in the last 50 years; this number does not account for any international trade in the species. The climate match is low for the contiguous United States. There was a small area of medium match in southern Florida. The certainty of assessment is high. The overall risk assessment category is low.
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Low Risk
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