Pomacanthus (Pomacanthodes) imperator   (Bloch)  1787 (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Size: 100 mm.

Color: Pattern quite different below or above about 100 mm length, with transitional stages. In the definite pattern the general color is purplish brown with a black patch above pectoral extending on chest and throat, from this black area numerous yellow bands run obliquely upwards to dorsal fin and backwards to tail and anal, in adult a brownish band originates on inter orbital space, crosses eye and curves down along preopercular border to angular spine, anal with longitudinal bands, caudal and paired fins yellowish. The about 25 yellow bands may be reduced to about 15 in younger specimens, who have a network of blue lines on anal and bluish lines on head and chest.

Oval, rather robust, height in adult 1.6-1.8, head 3.6-4 in length, rostro-dorsal profile slightly convex, in full grown examples somewhat concave to straight before eye. Eye 3.6-4 in middle of head, far above horizontal gape of mouth, equal to , in adult much smaller than broadly convex interorbital space and likewise to blunt snout. Posterior nostril oval, slightly larger than round anterior. Preoperculum finely serrate, the angular spine somewhat shorter or much longer than eye, according to age (and sex?) inter and suboperculum entire. Scales on trunk moderate, rounded, in anterior part of trunk in old specimens mixt with a few irregular smaller ones, no true basal auxiliaries present, the longitudinal series irregularly arranged, the vertical ones more regularly, on head minute, badly discernible to velvety, lateral line strongly arched, complete. Spinous dorsal about 2/5 longer than soft, the spines graduate, the last 1.5-1.7 in head, soft dorsal rounded, in old somewhat acutely produced, soft anal rounded, its third spine about equal to head without snout. Pectorals slightly shorter than head to equal, ventrals longer, the first ray being prolonged and nearly reaching anal, its spine longer or shorter than head. Caudal convex, least height of its peduncle 2-2.5 in head.

Remarks: Values in above description denote proportions.

Synonym (s)
Chaetodon imperator Bloch 1787
Chaetodon imperator Gmelin 1789
Chaetodon imperator Bloch and Schneider 1801
Chaetodon nicobariensis Bloch and Schneider
Holacanthus nicobariensis Bleeker 1855
Holacanthus imperator Lacepede 1803
Holacanthus geometricus Lacepede
Holacanthus imperator Cuvier and Valenciennes 1831
Holacanthus geometricus Cuvier and Valenciennes
Holacanthus imperator Bleeker 1852
Holacanthus imperator Gunther 1860
Holacanthus nicobariensis Gunther
Holacanthus imperator Playfair 1866
Holacanthus imperator Klunzinger 1870
Holacanthus imperator Gunther 1873
Holacanthus nicobariensis Gunther
Holacanthus imperator Gunther 1875
Holacanthus nicobariensis Gunther
Holacanthus imperator Day 1888
Holacanthus imperator Peters 1876
Holacanthus nicobariensis Peters
Acanthochaetodon nicobariensis Bleeker 1877
Acanthochaetodon imperator Bleeker 1878
Holacanthus nicobariensis Karoli 1882
Holacanthus imperator Klunzinger 1884
Holacanthus imperator Meyer 1885
Holacanthus imperator Gunther 1887
Holacanthus imperator Day 1889
Holacanthus nicobariensis Day
Holacanthus imperator Sauvage 1891
Holacanthus nicobariensis Sauvage
Holacanthus nicobariensis Boulenger 1897
Holacanthus nicobariensis Pellegrin 1898
Holacanthus marianas Seale 1901
Holacanthus nicobariensis Seale
Holacanthus bishopi Seale
Holacanthus imperator Jordan and Seale 1906
Holacanthus nicobariensis Jordan and Seale
Holacanthus marianas Jordan and Seale
Holacanthus bishopi Jordan and Seale
Holacanthus marianas Jordan and Dickerson 1908
Holacanthus nicobariensis Jordan and Dickerson
Holacanthus bishopi Snyder 1912
Holacanthus bishopi Snyder
Holacanthus nicobariensis M. Weber 1913
Holacanthus imperator M. Weber
Holacanthus bishopi Jordan 1913
Holacanthus nicobariensis Ogilby 1915
Holacanthus imperator Ogilby
Holacanthus nicobariensis Jordan and Starks 1917
Holacanthus nicobariensis Herre and Montalban
Holacanthus nicobariensis Fowler 1928
Holacanthus imperator Fowler
Holacanthus nicobariensis Fowler and Bean 1929
Holacanthus imperator Fowler and Bean
Holacanthus nicobariensis Pillay 1929
Holacanthus nicobariensis Herre 1931
Holacanthus imperator Herre 1932
Pomacanthus (Pomacanthodes) imperator Fraser-Brunner 1933

Common Name (s)
Economic Importance and Threats



• Andaman and Nicobar Islands, Nicobar INDIA (Record: 1936)
• INDIA (Record: 1936)

Literature Source(s)
  • Weber, M; Beaufort, LF (1936) The fishes of the Indo-Australian Archipelago Print times, Pataudi house, Daryaganj, New Delhi 7 607 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org

Page last updated on:2009-09-22

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