Black - The black redhorse is a slender sucker and the only Moxostoma that has 10 pelvic fin rays, all other species have nine.
Blacktail - The blacktail redhorse is characterized by a prominent black or dusky stripe on the lower lobe of its tricolored caudal fin.
Golden - This terete redhorse has a large head, with a length approximately 24 percent of the standard length. Upper and lower lips are plicate, and the rear edges of the lower lip meet in either a U or a V shape.
Grayfin - "Grayfin" redhorse are limited to the Chattahoochee River system; the "grayfin" redhorse looks like a blacktail redhorse but lacks the distinctive black and white striping on the lower lobe of the caudal fin.
Greater Jumprock - In Alabama, the greater jumprock is found in the Chattahoochee River drainage; the greater jumprock is the only Moxostoma species in Alabama with 16 rows of scales surrounding its caudal peduncle; all other species have 12 to 14 rows.
River - One of the largest redhorse suckers, the river redhorse is found in the Tennessee River and drainages to the north; the river redhorse has bright red caudal and anal fins and a dorsal fin with 12 or 14 rays.
Shorthead - The shorthead redhorse resembles the river redhorse, but the river redhorse can be distinguished by its larger head (21 to 26 percent of standard length) and the straight or slightly convex outer margin of its dorsal fin.
Silver - In Alabama, the silver redhorse is limited to the Tennessee River basin, anal fins are beige to orange compared with red for the river redhorse and the silver redhorse's lower lips meet at an acute angle (less than 90 degrees).