The robust redhorse (Moxostoma robustum) is a redhorse-type fish that lives in the freshwater streams of the eastern United States.

Using a 6-pound (2.7 kg) specimen from the Yadkin River of North Carolina, naturalist Edward Drinker Cope first described the robust redhorse as Ptychostomus robustus in 1870.

[2] The original specimen was lost or destroyed, and by the late 19th century, all mention of the robust redhorse had ceased.

[2] In August 1991, biologists with the Georgia Department of Natural Resources officially rediscovered the species when five specimens of the fish were collected in the Oconee River, and identified as robust redhorse.

[5] They live in both rocky and silty pools or less turbulent areas of small and medium rivers, and are also found in reservoirs and other water impoundments.