Head - Head depressed; cheeks noticable extending out from head when viewed from above; no rostral frenum; small wart-like barbel on snout near anterior nostril (JVT)
Papillae - A transverse papillae pattern with three rows before row 5s; row 5i/6i continuous and extending below the level of row d; rows 2 and 3 extend below row d; row b short not extending anterior of row 5s.
Color - Body light to dark brown with seven or eight light colored verticle bands, bands outlined in dark brown, a dark cresent band along the edge of the pectoral fin.
Distribution - Gulf of California from the mouth of the Colorado River to Guaymas in Sonora and from San Felipe to Los Frailes in Baja California.
Habitat - Found under rocks in tidepools and to depths of 14 meters.
Notes - There is considerable geographic variation in several meristic and morphometric characters, see Hosese, 1976.