Color variable (from brown to pink or yellow) with small black and white spots; 2 elongate black spots between first 3 dorsal spines (Ref. 4263). Total body plates 27-35. Caudal fin truncate, rounded, or lanceolate. Caudal peduncle short or lost in large females (Ref. 48635). Pelvic fin sexually dimorphic, forming a brood pouch in females (Ref. 9829).