French: Mulet de fleuve; Spanish: Lisa de río, tepemechín. PHYSICAL CHARACTERISTICS
Grows to 14.2 in (36 cm) in total length. Dorsal surface of head is convex between the eyes. Teeth are small and attached directly to the jawbones. Pharyngobranchial organ is rudimentary. There are 16-23 gill rakers on the lower part of first gill arch. Anal fin has two spines and 10 soft rays in adults. There are 38-46 scales in a longitudinal series along the flanks. Body is brownish, sometimes with a silvery band on the flanks from the pectoral to the caudal fin. Dorsal, anal, and caudal fins are dusky yellowish; there is a dark spot at the base of the caudal fin.
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