Small posterior barbel at angle of mouth. Anterior barbel visible in young disappears with age. Dorsal upper edge straight to convex, certain forms with dorsal very round and described under the name L. pseudocoubie. Gill rakers on 1st branchial arch. Dark body, bluish gray to violet black back and sides, light belly. Fins blackish or bluish-gray. Scales on sides with violet or red-violet center and bluish or blackish outer portion. Young grayish with scale rows separated by longitudinal dark sinuous lines. Outer lip has a series of folds (Ref.4967).