General appearance brown, gray, or olive dorsally, sometimes with diffuse scattered spots. A light spot is present medially on the snout, and two dark spots occur between the nostrils. The flanks show an abrupt transition from dark dorsal pigmentation to a white-silvery ventral coloration; the boundary runs horizontally below the eye but above the spiracle. Ventral side white to silvery; gills, heart, and gut coils not visible. Dark pigmentation of the trunk continues caudally onto the tail. Frequently, streaks are formed in the proximal half of the tail: darker dorsally and along the midline, with a lighter streak between and below these areas. Fin pigmentation variable; diffuse pigmentation especially in the proximal upper fin, with melanocyte dusting or reticulation and groups of iridophores in the mid-tail region. Lateral tail vein visible in the anterior third of the tail. Oral disc and papillae unpigmented.