Blackfin sucker

Thoburnia atripinnis

Black
Freshwater fish
Medium

The blackfin sucker (Vexillichthys atripinnis) is a species of ray-finned fish in the family Catostomidae. It is the only species in the genus Vexillichthys. It is found only in the United States in the headwaters of the Barren River system in south central Kentucky and Tennessee.

Class: Teleosts
Order: Minnows, Carps, and Loaches
Family: Catostomidae
Genus: Thoburnia
Water type: Freshwater