Acanthurus gahm   (Forsskal,  1775) (Fish)
Organism information awaits expert curation
Class: Actinopterygii

Image copyrights: Field, R (FishBase)

Max length : 40.0 cm TL

Dorsal spines (total): 9; dorsal soft rays (total): 24 - 28; anal spines: 3; anal soft rays: 23 - 26. Characterized by having 2 longitudinal bands on the side, one from the hind margin of the eye posteriorly, another from the groove around the caudal peduncle spine anteriorly.

Dioecious. External fertilization. Juveniles of less than 5 cm SL lack the anterior band; less than 10 cm SL lack the posterior band. Reaches 24 cm SL.

Synonym (s)
Acanthurus nigricans (non Linnaeus, 1758)
(Misapplied Name)
Acanthurus nigricauda (non Duncker & Mohr, 1929)
(Misapplied Name)
Chaetodon nigrofuscus gahhm Forsskal, 1775
(Senior Synonym)

Common Name (s)
Economic Importance and Threats
Importance:  Commercial
(Aquarium, Ornamental fish)

Habitat:  Reef Associated
Prey:  Zoobenthos


• Tamil Nadu, Chennai INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Palk Bay INDIA

Literature Source(s)
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Marine Biological Station, Chennai, Tamil Nadu (2003) Checklist of marine fauna of Tamil Nadu Department of Environment, Government of Tamil Nadu Available at -
  • Murty, VS (1996) Marine ornamental fishes of India Proceedings of the Seminar on Fisheries - A Multibillion Dollar Industry, Madras CMFRI 23-34 Available at -

Page last updated on:2011-04-05

Back to Search