Body bronze above, white on belly and thorax; iris light brown; pectoral fins hyaline, pelvic fins white. Slender and pungent dorsal spines; anal spines stout. Strong scales cover cheeks. Midline of thorax scaled but not pelvic ridges. Broad-based triangular flap of anterior nostril reaching half way to posterior nostril in juveniles, reducing to a small crescent with age.
Maximum length: 42.1 cm (TL), common length: 25-30 cm (TL)
Feeds on algae attached to the substrate and on floating algal fragments.
Gillnet, traps, seine net, trawl