Chromis dimidiatus   (Klunzinger,  1871) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: The Nature Conservation and Aquatic Sciences Service

Size: 32-112 mm.

Color: Brownish with violet tinge upto the level of first dorsal ray, the posterior half of body and caudal fin yellowish white, the two colors sharply defined. A pale bluish band on suborbital. Spinous dorsal chocolate brown. Soft dorsal and anal yellowish to somewhat dusky. Ventral dark brown. Pectoral light brownish with dark brown base.

Head 3.1-3.2 in standard length, 4.7-4.8 in total length. Depth of body 2.0-2.1 in standard length, 2.9-3.0 in total length. Eye diameter 2.6-2.8 in head, 0.5 in snout and equal to or slightly more than convex interorbital space. Mouth oblique. Maxillary reaching to below front border of eye. Preorbital not much deeper than suborbital, both bones covered with one row of scales. Anteriorly 3, posteriorly 2 transverse rows of scales on preopercle and one row on inferior limb. Posterior limb scaly. Hind border of preopercle smooth. Scales on upper part of head reaching to end of snout. Fifth and sixth dorsal spine longest, equal to eye and snout together. Soft dorsal somewhat pointed, the longest rays equal to head without snout. First anal spine less than half length of second, which is equal to snout and eye and shorter than first anal ray. Post median anal rays longest, equal to head without snout. Pectorals equal to head, much shorter than ventrals, which have the first ray produced into a long filament reaching on anal. Narrow band of conical teeth in jaws. Pectoral fin as long as head. Ventral fin with the first ray produced, equal to or more than pectoral fin, shorter in small specimens.. Caudal fin deeply forked, lobes filamentous. Opercular bones not serrated.
Number of spines and rays in the dorsal fin: XII, 12; number of spines and rays in the anal fin: II, 12; number of rays in the pectoral fin: ii, 13-14; number of spines and rays in the ventral fin: I, 5; number of scale rows along the lateral line: 16-17+8; 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: 3+1+8-9.

Remarks: Values in above description denote proportions.

Synonym (s)
Heliastes dimidiatus Klunzinger, 1871
Chromis dimidiatus de Beaufort, 1940
Heliastes dimidiatus Gunther, 1881
Glyphidodon bicolor Macleay, 1882
Chromis leucurus Gilbert, 1905
Chromis xanthurus Barnard, 1927
Chromis dimidiatus Montalban, 1927
Chromis dimidiatus Fowler and Bean, 1928
Chromis dimidiatus Fowler, 1928

Common Name (s)
• Ekkibadong Nilamahi
• Padatham
Economic Importance and Threats
Importance:  Commercial
(Ornamental fish; bait fish)



• Lakshadweep, Agatti INDIA
• Lakshadweep, Amini INDIA
• Lakshadweep, Andrott INDIA
• Lakshadweep, Minicoy INDIA
• Red Sea
• Lakshadweep INDIA
• Andaman and Nicobar Islands, Mahatma Gandhi Marine National Park INDIA
• Lakshadweep, Minicoy Island (Lat: 8.11) (Long: 73.3) 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 -
  • Beaufort, LF (1940) The fishes of the Indo-Australian Archipelago A. J. Reprints agency, Karol Bagh, New Delhi 8 508 pp Available at - NIO, Goa
  • Murty, VS (1996) Marine ornamental fishes of India Proceedings of the Seminar on Fisheries - A Multibillion Dollar Industry, Madras CMFRI 23-34 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 -
  • Silas, EG and Pillai, PP (1982) Bait fishes Resources of tunas and related species and their fisheries in the Indian Ocean, CMFRI Bulletin, 32 CMFRI 32 136-140 Available at -

Page last updated on:2011-09-29

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