Description
The Yaqui chub has a short and rounded snout, which causes the mouth to be small and slightly subterminal. It has large eyes placed on a thick head, placed on a deep body. This is different from the posterior portion of the body, which is much thinner. The Yaqui chub has enlarged scales that are roughly imbricated. Coloration is usually dark overall, but sometimes has a lighter underside. The Yaqui chub's lateral bands are underdeveloped, making them quite difficult to observe. However, a vertically placed, triangle-shaped spot is usually present on the caudal fin.
Very few Yaqui chub can grow to about 17.8 cm (7 in) long, while the average length of this fish is less than 13 cm (5.1 in) long. Juveniles are usually 40-50 mm (1.6-2 in).
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