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.

Scleronema operculatum is a trichomycterid catfish species that has received little research attention. The known distribution is the Uruguay River basin in southern Brazil and Uruguay, and there have been no reports of the species outside of its native range. Along with the rest of its taxonomic family, it is listed as a prohibited species in the state of Florida. Climate match to the contiguous U.S. is medium, with the highest matches in North Carolina and Texas. The overall risk for this species is uncertain.

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Uncertain Risk
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A man is fishing in a boat with three young girls. The kids are excitedly pulling a fish out of the water.
Healthy fisheries and waters are the foundation of America’s outdoor traditions and give us the freedom to fish, boat, and enjoy the benefits of outdoor recreation. The Fish and Aquatic Conservation programs work with states, tribes, and communities to provide a comprehensive approach to freshwater...
Silver Carp Jumping
Aquatic invasive species cause tremendous harm to our environment, our economy, and our health. They can drive out and eat native plants and wildlife, spread diseases, and damage infrastructure. We work to protect our waterways and the communities that depend on them from the threat of invasive...
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Invasive species