Coppercheek Darter (Etheostoma aquali)

Description: 

The Coppercheek Darter is only found in the Duck River System in west-central Tennessee. It resides in rocky riffles with swift current. As the common name implies, both males and females of this species have wavy copper lines on their cheeks. They lay their eggs on the underside of slab rocks, and males guard the nests.