坦氏小鲈为辐鳍鱼纲鲈形目鲈亚目河鲈科的其中一种，被IUCN列为次级保育类动物，分布于美国田纳西河上游流域，体长可达7.6公分，栖息在砂石底质的溪流、属肉食性，以水生昆虫为食。

• Froese, Rainer & Daniel Pauly, eds. (2012). Percina tanasi in FishBase. 2012年6月版本

The snail darter (Percina tanasi) is a species of fish that is found in East Tennessee freshwater in the United States. It is in the perch family (family Percidae) of the order Perciformes. Discovered in 1973, the snail darter was listed as endangered under the U.S. Endangered Species Act of 1973 by 1975 and was involved in a legal controversy leading to a Supreme Court ruling to halt the completion of Tellico Dam, which posed a risk of extinction for the snail darter by blocking its migratory route — see Tennessee Valley Authority v. Hill, snail darter controversy.