The Great Fiji Butterflyfish Count

 Pyramid butterflyfish 

18.0 cm TL (male/unsexed; Ref. 9710)tropical; 32°N – 25°Saquarium: commercial; price category: not marketed/unknown

Hemitaurichthys polylepis (Bleeker, 1857)

Image for Hemitaurichthys polylepis, Chaetodontidae, Pyramid butterflyfish.


Hemitaurichthys polylepis (Bleeker, 1857)
Family: Chaetodontidae (Butterflyfishes) picture (Hepol_u0.jpg) by Randall, J.E.
Image for Hemitaurichthys polylepis, Chaetodontidae, Pyramid butterflyfish.

AquaMaps | Point map |
Order: Perciformes (perch-likes)
Class: Actinopterygii (ray-finned fishes)
FishBase name: Pyramid butterflyfish
Max. size: Environment: reef-associated; marine; depth range 3 – 40 m



Resilience: High, minimum population doubling time less than 15 months(Preliminary K or Fecundity.) Vulnerability: Low vulnerability (10.00), based on Lmax and K (Ref. 59153)

Gazetteer Pacific Ocean: Christmas Island in the eastern Indian Ocean to Indonesia and the Hawaiian, Line, and Pitcairn islands, north to southern Japan, south to Rowley Shoals and New Caledonia. Replaced by Hemitaurichthys zoster in the Indian Ocean (Ref. 37816).

Morphology: Dorsal spines (total): 12 – 12; Dorsal soft rays (total): 23 – 26; Anal spines: 3; Anal soft rays: 19 – 21. Readily identified by unusual coloration (Ref. 48636).

Biology: Occur in large schools that may extend several meters above the edges of steep current-swept outer reef slopes. Common (Ref. 9710). Engybenthic (Ref. 58302). Feed on plankton (Ref. 3921). Oviparous (Ref. 205). Form pairs during breeding (Ref. 205). Red List Status: Not Evaluated (Ref. 57073) Dangerous: harmless Coordinator: Main Ref: Myers, R.F.. 1991. (Ref. 1602)

For more Butterflyfish information:

A Guide to Angelfishes and Butterflyfishes
Author: Gerald R Allen, Roger Steene, Mark Allen.
ISBN 0-9661720-1-9

Reef Fish Identification – Tropical Pacific
Author: Gerald Allen, Roger Steene, Paul Human
ISBN: 978-1878348364

Reef Fishes of the World
Authors: Lieske and Myers,
ISBN: 978-0691089959

Coral Reef Animals of the Indo-Pacific

Author: Terrence M. Gosliner, David W. Behrens
ISBN: 978-0930118211