Acanthurus elongatus   (Lacepede,  1802) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: The Nature Conservation and Aquatic Sciences Service

Size: 59-110 mm

Color: Variable; uniform chocolate brown to blackish, breast lighter than body, sometimes with pale grayish longitudinal lines on sides of body and pale spots on cheeks and breast. Dorsal and anal fins deep chocolate brown, anal generally darker, both fins narrowly edged with black. Axils and bases of posterior 2 or 3 dorsal and anal rays black. Caudal spine in black sheath. Caudal dark brown with narrow white distal edge, sometimes lower and upper border posteriorly edged with white. Pectoral pale hyaline, rays dusky, upper border dark. Ventral dark brownish, bases of soft rays generally lighter.

Head 3.3-3.6 in standard length, 4.3-4.7 in total length. Depth of body 1.9-2.1 in standard length, 2.5-2.7 in total length. Eye diameter 3.3-3.6 in head, 1.8-2.2 in snout and 1.2-1.3 in convex interorbital space. Profile of snout rather concave. Corner of mouth nearer to hind border of preopercle than to eye. Teeth strongly lobate, 5 or 6 on each side of upper jaw and 6 or 7 on each side of lower jaw. First dorsal fin spine short, spines increasing in length to the last measuring about twice eye diameter. First anal fin spine short, 3rd longer than 2nd and a little shorter than last dorsal spine. Pectoral fin longer than head, ventral fin as long as head. Caudal lunate, lobes pointed, the upper lobe usually longer than the lower.
Number of spines and rays in the dorsal fin: IX, 24-25; number of spines and rays in the anal fin: III, 23-24; number of rays in the pectoral fin: ii, 14; number of spines and rays in the ventral fin: I, 5; number of scale rows along the lateral line: 120-138; number of horizontal scale rows usually counted from origin of the dorsal fin to the lateral line and from anal origin to the lateral line: 11-13+40-44.

Remarks: Values in above description denote proportions.

Synonym (s)
Chaetodon elongatus Lacepede, 1802
Acanthurus elongatus Jones and Kumaran, 1965
Acanthurus lineolatus Cuvier and Valenciennes, 1835
Acanthurus nigroris Smith and Smith, 1963

Common Name (s)
• Kalahandi
• Rykathi
• Pala
• Neythala
Economic Importance and Threats
Importance:  Commercial
(Ornamental fish)

Habitat:  Reef Associated


• Lakshadweep, Agatti INDIA
• Lakshadweep, Bangaram INDIA
• Lakshadweep, Kadamatt INDIA
• Lakshadweep, Minicoy INDIA
• Lakshadweep, Suheli INDIA
• Lakshadweep INDIA
• Lakshadweep, Chettalatt INDIA (Record: 05/01/1987-06/02/1987)
• Lakshadweep Islands INDIA (Record: 11/1993-01/1997)

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 -
  • Jones, S and Kumaran, M (1965) New records of fishes from the seas around India - Part III Journal of the Marine Biological Association of India Marine Biological Association of India 7(2) 381-400 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 -
  • Kumaran, M; Murty, VS and Lalmohan, RS (1989) Resources of ornamental fishes Marine living resources of the union territory of Lakshadweep: An indicative survey with suggestions for development Bulletin of Central Marine Research Institute CMFRI 43 46-64 Available at -
  • Murty, VS (2002) Marine ornamental fish resources of Lakshadweep CMFRI Special Publication CMFRI 72 1-134 Available at -
  • Murty, VS (2001) Ornamental fish resources of Lakshadweep Bulletins of the Geological Survey of India 56 103-111 Available at -

Page last updated on:2011-06-28

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