Acanthurus auranticavus, Raja Ampat, Indonesia, Photo: Rick Stuart-Smith
Small round black marking behind eye, transparent/light rear tail margin, and dark orange border around dark spine on tail base. Often has white ring around tail base, but this is not a distinguishing feature. Large, very dark individuals can be very difficult to distinguish from A. blochii from a distance, and these species sometimes even school together.
Max Size: 45 cm
Sea Temperature Range: 22.3-31.6°C
Habitat: Coral Reef
Habitat Generalisation Index: 4.2
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
IUCN Threat Status: Least Concern
Occurrence: Infrequent (10% 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 (9 per transect)
Abundance is calculated as the average number of individuals recorded per RLS transect, where present.