American Brook Lamprey (Lethenteron appendix)

Description: 

The American Brook Lamprey has a patchy distribution across north-central and northeastern North America from Alabama to Quebec, including the Tennessee and Cumberland River drainages. Adults are found in small streams to medium rivers with gravel substrates, while larvae (ammocoetes) are found along banks in soft substrate. American Brook Lampreys are non-parasitic, meaning they do not feed as adults and also do not have functional teeth on their oral disc.