The greater redhorse has a relatively large rounded head and small eyes. The rear edge of the dorsal fin is nearly straight to slightly convex and they have a bright red tail. They are only found in the Lake Erie basin in Ohio. The very similar river redhorse has a less rounded head, larger eye, and a slightly concave rear edge to the dorsal fin. Shorthead and smallmouth redhorse have smaller heads, more slender bodies, and obviously concave dorsal fins.