The redtail chub (Nocomis effusus) is a freshwater fish found in the U.S. states of Tennessee and Kentucky.

Apparently the redtail chub is strongly tied to the Mississippian gravel habitats of the Highland Rim.

[3] Adult redtail chubs feed primarily on aquatic invertebrates, including small mollusks, insects, earthworms, and crustaceans.

[3] A potential predator of the redtail chub is the channel catfish, Ictalurus punctatus, which has been found preying on related species in Pennsylvania.

The redtail chub prefers clear rocky runs and pools of creeks and small rivers.

Stream gradient, turbidity, and coal mine pollution probably restrict its present distribution and abundance.

[3] The redtail chub breeds in late spring and females reach sexual maturity around the 2-year mark.

The abundance of the redtail chub is thought to be in decline as the fish if used as bait by anglers and costs around $12 a dozen retail, making harvesting a lucrative trade.