Description: English: An adult male Etheostoma gracile (slough darter) from a tributary of the Kaskaskia River in Illinois. Date: 5 April 2013, 13:47:53. Source: Own work. Author: Fredlyfish4. Camera location38° 10′ 01.97″ N, 89° 52′ 40.44″ WView all coordinates using: OpenStreetMap 38.167215; -89.877900.