An established population of a neotropical cichlid fish, Cichlasoma managuense, was found in a spring pool in the Virgin River basin, Utah. Presence of this predatory species poses an additional threat to the native fish fauna of the Virgin River, which already has suffered multiple impacts of water development and introduced fishes.
Marsh, Paul C.; Burke, Thomas A.; DeMarais, Bruce D.; and Douglas, Michael E.
"First North American record of Cichlasoma managuense (Pisces: Cichlidae),"
Great Basin Naturalist: Vol. 49
, Article 5.
Available at: http://scholarsarchive.byu.edu/gbn/vol49/iss3/5