Dorsal spines (total): 0; Anal spines: 0. A single row of strong sharp spines along mid-dorsal line from a point about 1 interorbital space behind the orbits to the first dorsal fin; 1 or 2 large spines on shoulder girdle; in males, patches of large sharp spines near tips of pectoral fins and extending toward snout along margin of the fin (Ref. 6885). Caudal fin much reduced; pelvic fins large and deeply notched (Ref. 6885). All fins covered with scales (Ref. 6885). Adults slate black on back; juveniles a uniform grayed brown with small brown spots; white on ventral surface; white spot on either side of tail evident in small individuals (Ref. 6885).
Source: FishBase. McEachran, J.D. and K.A Dunn. 1998 . (Ref. 27314).