Naso tuberosus   Lacepede,  1801 (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: Gloerfelt-Tarp, T.

Size: Max length 60.0 cm SL (male/unsexed)

Color: Gray with brownish tinge on back becoming lighter below; head, back and sides with small blackish spots. Dorsal and anal pale brownish with broad white margin and two rows of blackish spots, the upper row of spots on dorsal more or less forming a band. Pectoral pale brownish, distal margin broadly whitish. Ventral pale, tip slightly dusky. Caudal brownish with white outer margin and scattered blackish spots.

Head 3.6-3.7 in standard length, 4.6-4.7 in total length. Depth of body 2.2-2.3 in standard length, 2.8-2.9 in total length. Eye diameter 3.5-3.7 in head, 2.0-2.3 in snout and 1.2 in interorbital space. A hump on forehead. 15 or 16 pointed and minutely serrated teeth on each side of both jaws. First spine of dorsal slightly longer than 1.5 eye diameter, subsequent spines showing gradual decrease in length. Second anal fin spine longer than first, equal to eye diameter. Rays of dorsal and anal fins gradually decreasing in length posteriorly. Caudal peduncle with 2 bony bucklers, each with a broad compressed spine. Pectoral fin slightly longer than snout, ventral fin shorter than pectoral. Caudal fin emarginate.
Number of spines and rays in the dorsal fin: V, 29; number of spines and rays in the anal fin: II, 26; number of rays in the pectoral fin: ii, 16; number of spines and rays in the ventral fin: I, 3.

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

Remarks: Values in above description denote proportions.

Synonym (s)
Naso tuberosus Lacepede, 1801
(Senior synonym)
Naso tuberosus Lacepede, 1802
Cyphomycter tuberosus Smith and Smith, 1963
Naseus tuberosus Day, 1878

Common Name (s)
• Humpnose Unicornfish (English)
• Fullikkarukkan (Malayalam)
• Mudiyan (Malayalam)
• Thol kilathi
Economic Importance and Threats
(Ornamental fish)

Habitat:  Reef Associated, Estuarine
Trophic Level:  Primary Consumer
Prey:  Benthic algae or weeds (mainly the green alga Caulerpa)


• Lakshadweep, Agatti INDIA
• Lakshadweep, Bitra INDIA
• Lakshadweep, Kavaratti INDIA
• Lakshadweep INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Lakshadweep, Kavaratti Island (Lat: 10.56) (Long: 72.95) INDIA (Record: 03/1954)
• Lakshadweep Islands INDIA (Record: 11/1993-01/1997)
• Andaman and Nicobar Islands, Nancowry Island INDIA

Literature Source(s)
  • 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
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Froese, R and Pauly, D (2000) Fishbase 2000: Concepts, design and data sources ICLARM 344 pp Available at -
  • Dr. Kumaraguru, AK (2000) Studies on socioeconomics of Coral Reef resource users in the Gulf of Mannar coast, South India Centre for Marine and Coastal studies School of Energy, Environment and Natural Resources Madurai Kamaraj University, Madurai, India 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 -
  • Balan, V (1958) Notes on a visit to certain islands of the Laccadive Archipelago, with special reference to fisheries Journal of the Bombay Natural History Society Bombay Natural History Society 55 (2) 297-306 Available at -
  • Murty, VS (1996) Marine ornamental fishes of India Proceedings of the Seminar on Fisheries - A Multibillion Dollar Industry, Madras CMFRI 23-34 Available at -
  • Murty, VS (2002) Marine ornamental fish resources of Lakshadweep CMFRI Special Publication CMFRI 72 1-134 Available at -
  • Ghosh, S; Ganeshamurthy, R; Balamurugan, J and Kumar, TTA (2011) Reef fishing- An off season amusement at Lakshadweep Fishing chimes 31(1) 128-130 Available at - NIO, Goa
  • Murty, VS (2001) Ornamental fish resources of Lakshadweep Bulletins of the Geological Survey of India 56 103-111 Available at -
  • (2011) Animal discoveries 2010 Zoological Survey of India 1-107 Available at -
  • Pillai, PKM and Augustine, SK (2000) A code list of common marine living resources of the Indian seas CMFRI Special Publication No.12 CMFRI 1-115 Available at -

Page last updated on:2011-12-07

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