Overview
The Golden Redhorse (Moxostoma erythrurum) is one of the most widespread and attractively colored native suckers in North America’s river systems. Named for its shimmering brassy-golden scales and translucent slate-yellow fins, it is an essential benthic grazer that thrives in clear, flowing streams across the Mississippi, Ohio, and Great Lakes watersheds.
Biology and Physical Characteristics
The Golden Redhorse has a moderately compressed, torpedo-shaped body with a bronze-olive back and radiant golden-yellow sides. Unlike red-tailed redhorse species, its dorsal, pelvic, and caudal fins are slate-grey to warm amber-olive without scarlet pigment. Its subterminal mouth is bordered by thick, plicate lips with a distinct V-shaped crease along the lower lip margin.
Behavior and Ecology
A gregarious schooling fish, the Golden Redhorse frequents deep river pools and eddy margins, moving out into swift gravel runs and riffles to feed. In late spring, schools assemble on shallow gravel shoals where spawning occurs with great splashing as males vibrate beside females over clean river gravel, burying fertilized eggs in the oxygen-rich stones.
Conservation and Human Impact
Assessed as Least Concern by the IUCN, the Golden Redhorse remains abundant throughout healthy watersheds in the American Midwest and South. It serves as an important ecological indicator of stream health, as it cannot tolerate chronic agricultural siltation, heavy dam impoundments, or industrial runoff.
Interesting Factoid
The Golden Redhorse reflects sunlight through clear stream currents like an underwater ingot of gold, schooling in dozens over gravel riffles while hoovering up insect larvae.