Fantail Darter (Etheostoma flabellare)

Description: 

The Fantail Darter is widespread across central and eastern North America from Kansas to Quebec, including the Tennessee and Cumberland river drainages in Alabama and Tennessee. They live in riffles with gravel substrate in creeks to medium rivers. Like other members of the subgenus Catonotus, this species spawns on the underside of flat rocks. In this group, males of some species have knobs on their first dorsal fin that are hypothesized to serve as an “egg-mimic” to attract females for spawning.