Description: A medium-sized (length up to 43 cm [to 18 in.]) fish with a slender body, a slight hump on the dorsal surface behind the head, and small and deeply embedded scales (that may be absent). The caudal peduncle is long and narrow, and the tail fin is fairly long and deeply
forked. The overall coloration is silvery with olive shading on the dorsum,
and the mouth and fins may have yellow-orange coloration. The mouth is
relatively large.
Diet: Omnivorous. Feeds on invertebrates and algae. Larger individuals
also eat other fish.
Habitat: Deep runs and pools with slow to moderate velocities and sand,
large rocks, cover in the form of overhanging banks and tree roots.
Range: Found only in the Muddy River between the Warm Springs area
and the Wells Siding diversion to Bowman Reservoir.
Comments: Formerly referred to as an unnamed subspecies of the
Roundtail Chub (Gila robusta spp.).
Special Remarks: Species of Concern. Due to recent DNA studies, the
Muddy River population may be the same as the Virgin River population.