Anisochaetodon (Oxychaetodon) falcula   (Bloch)  1795 (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Size: 200 mm.

Color: In alcohol specimens yellowish, eye crossed by a brown white-border band as broad as eye, beginning much narrower on front and running to isthmus where it is united with its fellow, on trunk descend two triangular patches, one from about the four anterior dorsal spines to below lateral line, or its point reaches to below pectoral, the second from front of soft dorsal, including the last dorsal spines, to lateral line, on flanks ten to fifteen vertical, often rather faint dark lines, base of caudal peduncle with a blackish ring, faintly continued on soft dorsal and anal, caudal with a submarginal dark band.

Orbicular, posteriorly more elevated, anteriorly pointed by the prominent pointed snout, rostro-dorsal profile above eye rather steeply ascending in a nearly straight line, before dorsal passing over in convexity of back, before eye concave till maxillaries. Height 1.5-1.8, head about thrice in length. Eye 3.6 to about four in head, nearly equal to slightly convex interorbital space and 1.6 to nearly twice in snout, which goes more than twice in length of head. Cleft of mouth horizontal, mandibula rather prominent. The conspicuous brushlike teeth in both jaws about equal long. Rounded angle of preoperculum nearly edentulous, its inferior border sinuated. Scales large, in horizontal series, in upper part of trunk somewhat arched, diminishing in size posteriorly, much smaller on head, chest and median fins, lateral line arched till about below origin of soft dorsal, thence abruptly descending till termination of dorsal. Spinous dorsal about four spines longer than base of rounded soft dorsal, spines with incomplete membrane, gradually increasing in height till sixth or seventh, the following subequal, the four last less strong, more than twice in head. Pectorals 1.2, ventrals 1.3 in head, the first ray prolonged into a short seta. Caudal convex, least height of its peduncle as long as eye.

Remarks: Values in above description denote proportions.

Synonym (s)
Chaetodon falcula Bloch 1795
Chaetodon falcula Bloch and Schneider 1801
Pomacentrus falcula Lacepede 1802
Chaetodon ulietensis Cuvier and Valenciennes 1831
Chaetodon falcula Cuvier and Valenciennes
Chaetodon dizoster Cuvier and Valenciennes
Chaetodon falcula Bleeker 1853
Chaetodon falcula Peters 1885
Chaetodon falcula Bleeker 1855
Chaetodon ulietensis Bleeker 1850
Chaetodon falcula Gunther 1860
Chaetodon dizoster Gunther
Chaetodon ulietensis Gunther
Chaetodon falcula Kaup 1860
Chaetodon dizoster Kaup
Chaetodon ulietensis Kaup
Tetragonopterus falcula Bleeker 1865
Tetragonopterus ulietensis Bleeker
Chaetodon falcula Playfair and Gunther 1866
Chaetodon falcula Gunther 1875
Tetragonoptrus (Oxychaetodon) falcula Bleeker 1878
Chaetodon falcula Day 1878
Chaetodon falcula Macleay 1882
Chaetodon aurora de Vis 1885
Chaetodon falcula Sauvage 1891
Chaetodon falcula Jatzow and Lenz 1899
Chaetodon falcula Seale 1901
Chaetodon ulietensis Jordan and Seale 1906
Chaetodon falcula Evermann and Seale 1906
Chaetodon falcula Steindachner 1906
Chaetodon ulietensis Jordan and Snyder 1906
Chaetodon ulietensis Snyder 1912
Chaetodon falcula Ogilby 1912
Chaetodon dizoster Ahl 1923
Chaetodon falcula Ahl
Chaetodon ulietensis Ahl
Chaetodon ulietensis var. confluens Ahl
Chaetodon ulietensis aurora Ahl
Chaetodon falcula Barnard 1927
Chaetodon ulietensis Herre and Montalban 1927
Chaetodon falcula Fowler 1928
Chaetodon falcula Fowler and Bean 1929
Chaetodon ulietensis Herre 1931

Common Name (s)
Economic Importance and Threats



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

Page last updated on:2009-09-22

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