Head large, triangular. No spines around orbit; nasal spine absent, opercular spine long, nuchal spine long, rostral spines strong but short, no antrorse rostral spine, cleithral spine long. Base of first dorsal fin with 10 flat plates, first plate extends in advance of first dorsal-fin spine. Lateral line scales small, more than 70 rows. Head and dorsum covered with prominent black spots.