Acanthurus nigricauda
Eyeline Surgeonfish | Blackstreak Surgeonfish | Epaulette Surgeonfish | Shoulderbar Surgeonfish | White-tail Surgeonfish | Acanthurus nigricaudus
Acanthurus nigricauda, Bali, Indonesia, Photo: Ian Shaw
Acanthurus nigricauda, Maldives, Photo: Rick Stuart-Smith
Acanthurus nigricauda, Qld, Australia, Photo: Andrew Green
Acanthurus nigricauda, Bali, Indonesia, Photo: Ian Shaw
Acanthurus nigricauda, Maldives, Photo: Rick Stuart-Smith
Acanthurus nigricauda, Maldives, Photo: Rick Stuart-Smith
Same Genus
Distribution
Tropical Indo-Pacific
Description
Grey body, rounded head profile, long black streak behind eye, long black streak extending forward from black tail spine, and yellow tipped pectoral fin. Markings difficult to distinguish in dark phase. White band on tail base and pale grey tail, which is strongly lunate.
Information
Max Size: 40 cm
Sea Temperature Range: 24.1-31.2°C
Depth: 1-30m
Habitat Generalization Index: 19
Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.
Conservation and Rarity
IUCN Status: Least Concern
Occurrence: Common (26.9% of sites)
Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed
Abundance: Several (6 per transect)
Abundance is calculated as the average number of individuals recorded per RLS transect, where present.
Edit by: Joe Shields