Cyclothone microdon   (Gunther,  1878) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: Fishbase

Size: 60 cm.

Color: Uniform brownish or blackish brown.

Front slightly concave, laterally bordered by a series of 3 blunt tubercles the last and middle of which are more approximated than the middle of which are more approximated than the middle and the anterior. Mandible slightly prominent, with a ventrally directed spine at the symphysis. Origin of dorsal and anal opposite, far behind ventrals, which are situated slightly before middle of length and reach beyond the anus, which is situated nearer to ventrals than to anal. End of pectorals far distant from ventrals, in the middle of the body or slightly before it. Caudal deeply forked. Scales large, thin, 4 between anal and dorsal. Intermaxilla with 8-10 unequal teeth, one or two of which are enlarged. About 90-100 maxillary teeth, the anterior third of which smaller and vertically inserted. The posterior obliquely directed forward, generally increasing in size from before backward, intermingled with about 10-12 larger ones. In the anterior part of the mandibula about 12 subequel teeth between which 2 much larger ones, one behind the 3 or 4 most anterior ones the second nearly at the end of the row, behind them a continuous series of about 100 gradually increasing in size from before backwards, 2-3 on the palatines, 4-6 on the pterygoids. Luminous organs small: A black suborbital one, 2 operculars above each other, the dorsal on the level of the eye, the ventral on the level of the maxilla, 9-10 between branchiostegal rays. 13 in a ventral series between isthmus and ventrals, 5 between ventrals and anal, the 2 anterior of which before anus, 14-15 between origin of anal and caudal, the 3-4 hindermost behind anal. A lateral series of 8-9 between operculum and the vertical through anus, the one or two hindermost more distant.

Protandrous, sex reversal at 22-24 mm SL.

Remarks: Values in above description denote proportions.

Synonym (s)
Gonostoma microdon Gunther, 1878
(Senior synonym)
Cyclothone lusca Goode and Bean, 1883
Neostoma quadrioculatum Vaillant, 1888
Cyclothone microdon Goode and Bean, 1896
Gonostoma microdon Alcock, 1898
Cyclothone microdon Alcock, 1899
Cyclothone microdon Brauer, 1906
Cyclothone microdon Max Weber, 1913
Cyclothone microdon Weber and de Beaufort, 1913

Common Name (s)
Economic Importance and Threats

Habitat:  Pelagic, Reef Associated, Demersal
Trophic Level:  Consumer
Prey:  Copepods, ostracods


• Bay of Bengal (Lat: 15) (Long: 90) INDIA
• Lakshadweep, Minicoy INDIA
• Lakshadweep, Minicoy Island (Lat: 8.11) (Long: 73.3) INDIA
• Andaman and Nicobar Islands INDIA

Literature Source(s)
  • Wafar, MVM (2003) Checklists of reef fauna Available at -
  • Rao, DV; Devi, K and Rajan, PT (2000) An account of ichthyofauna of Andaman and Nicobar Islands, Bay of Bengal Occasional paper no 178 Records of the Zoological Survey of India ZSI, Calcutta 1-434 Available at - NCL, Pune
  • 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
  • Alcock, A (1994) A descriptive catalogue of the Indian deep sea fishes in the Indian museum Oxford and IBH Publishing Co. Pvt. Ltd.,New Delhi 1-211 Available at - CMFRI Library, Cochin- 682018
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Weber, M; Beaufort, LF (1965) The fishes of the Indo-Australian Archipelago E.J. Brill, Leiden, Holland 2 404 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 (1959) The fishing industry of Minicoy Island with special reference to the tuna fishery Indian Journal of Fisheries Indian Council of Agricultural Research 6 (1) 30-57 Available at -
  • Talwar, PK (1990) Fishes of Andaman and Nicobar Islands: A synoptic survey Journal of the Andaman Science Association Andaman Science Association, Port Blair 6(2) 71-102 Available at - NIO,Goa

Page last updated on:2011-07-01

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