The San Rafael River in central Utah is home to three native species, roundtail chub, blue head suckers and flannelmouth suckers. The river is a tributary of the Green River which then flows into the Colorado River. These populations are listed as "sensitive" because of habitat loss and competition and predation from introduced fish species. However, this section of the river near Buckhorn Wash has only native species. The fish rise on the right in the photo is likely from a a roundtail chub feeding on surface insects.
Limnology - The study of inland watersPhoto: 26 May 2013