Naso brachycentron   (Valenciennes,  1835) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: CSIRO

Size: 51.5 cm.

Color: In preserved specimens dark purplish plum or oliver, nearly black, on head and dorsally, and becoming paler purplish brown to violet-brown on side and below, throat and breast may be violet-grey, dorsal and anal very dark purplish brown, pectoral deep brown with a white posterior margin, the caudal has more or less yellow or whitish yellow, mostly as stripes between the feather-like rays.

Height 2.72-2.84. Head 3.9-4, the forehead produced into a very long, slender, tapering cylindrical horn which extends far beyond mouth, its axis passing through center of eyes or sometimes through upper third of eye to tip of horn its length varies from a little more than head to 1.4 times head. Upper profile below base of horn forms a steep straight line, about 3 times in head, it is a trifle less than distance from eye to front dorsal spine. Eye 4.8-5, 3-3.33 in snout, 1.85-2 in the broad keeled inter orbital spaces. Teeth small, conical, serrulate, about 33 on each side in upper jaw. First dorsal spine 3-3.7 in head. Dorsal rays equal to or exceeding the spines in height, about 3 in head. Dorsal angulate posteriorly. Anal spines 4-5.66 in head. Dorsal angulate posteriorly Anal spines 4-5.66 in head. Anal like dorsal, but lower the rays 3.7 in head. Pectorals about 1.66 in head. Vertical spine 3 in head. Caudal broad, nearly truncate, the broad rays pinnate and lobate on posterior margin. On each side of caudal peduncle two large oval bony plates. the anterior one larger and equal to eye, each with a high, keen-edged, knife like keel, variable in shape.

Dioecious, external fertilization, nonguarders, open water/substratum egg scatterers. Spawn in pairs.

Remarks: Values in above description denote proportions.

Synonym (s)
Naso brachycentron Herre, 1927
Naseus brachycentron Cuvier and Valenciennes, 1835
Naso brachycentron Smith, 1966
Naso rigoletto Smith, 1951
Naseus brachycentron Valenciennes, 1835
(Senior synonym)
Naso brachycentron (Valenciennes, 1835)
(Senior synonym)
Naso rigoletto Smith, 1951
(Junior synonym)
Prionolepis hewitti Smith, 1931
(Ambiguous synonym)

Common Name (s)
• Komban Karukkan (Malayalam)
• Humpback Unicornfish (English)
Economic Importance and Threats
Importance:  Commercial

Habitat:  Reef Associated, Coastal
Trophic Level:  Primary Consumer
Prey:  Benthic algae/weeds


• Lakshadweep INDIA
• Lakshadweep, Agatti INDIA
• Andaman and Nicobar Islands, South Andaman, Neil Island INDIA

Literature Source(s)
  • Wafar, MVM (2003) Checklists of reef fauna Available at -
  • James, C; O'Farrell, S; Hamylton, S; Ingwersen, C and Walker, R The coral reef resources of Mu Ko Surin national park, Thailand Coral Cay Conservation Available at -
  • Letourneur, Y; Chabanet, P; Durville, P; Taquet, M; Teissier, E; Parmentier, M; Quero, JC and Pothin, K (2004) An updated checklist of the marine fish fauna of Reunion Island, south-western Indian Ocean Cybium 28(3) 199-216
  • Kemp, JM (1998) Zoogeography of the coral reef fishes of the Socotra Archipelago Journal of Biogeography 25 919-933
  • Allen, GR (2005) Reef fishes of northwestern Madagascar RAP Bulletin of Biological Assessment 31 39-48
  • Durville, P; Chabanet, P and Quod, JP (2003) Visual Census of the Reef Fishes in the Natural Reserve of the Glorieuses Islands (Western Indian Ocean) Western Indian Ocean J. Mar. Sci. WIOMSA 2 95-104
  • Chabanet, P and Patrick, D (2005) Reef Fish Inventory of Juan De Novas Natural Park (Western Indian Ocean) Western Indian Ocean Journal Marine Sciences 2005 WIOMSA 4 145-162
  • Allen, GR and Mohammed, A (2003) Coral Reef Fishes of Indonesia Zoological Studies 42(1) 26299 Available at - Digital Information Resource Center, Pune.
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Beaufort, LF and Chapman, WM (1951) The fishes of the Indo-Australian Archipelago A. J. Reprints agency, Karol Bagh, New Delhi 9 484 pp Available at - NIO, Goa
  • Jones, S and Kumaran, M (1980) Fishes of the Laccadive Archipelago The Nature Conservation and Aquatic Sciences Service, Trivandrum, Kerala 760 pp Available at - NIO, Goa
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at -
  • Jones, S and Kumaran, M (1967) New records of fishes from the seas around India - Part V Journal of the Marine Biological Association of India Marine Biological Association of India 9 (1) 1-12 Available at -
  • Jones, S. (1969) Catalogue of fishes from the Laccadive Archipelago in the reference collections of the Central Marine Fisheries Research Institute. Bulletin of Central Marine Research Institute CMFRI, Cochin 8 1-35 Available at -
  • (2011) Animal discoveries 2010 Zoological Survey of India 1-107 Available at -

Page last updated on:2011-08-17

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