Acanthurus olivaceus, Adult, NSW, Australia, Photo: Ian Shaw
Acanthurus olivaceus, Juvenile, NSW, Australia, Photo: Ian Shaw
Acanthurus olivaceus, Adult, Dark phase, Bali, Indonesia, Photo: Ian Shaw
Temperate Australasia, Tropical Indo-Pacific
Oval-shaped body with a rounded head. Pale grey front half of body, dark rear half, broad black-edged orange streak behind eye, black tail spine, and lunate tail. Juveniles yellow, with a faint trace of an orange streak behind eye. Similar to other yellow juvenile surgeons and best distinguished by presence of adults.
Max Size: 35 cm
Sea Temperature Range: 17.4-31.3°C
Habitat: Coral Reef, Rocky Reef
Habitat Generalisation Index: 18.8
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: Frequent (12% 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 (5 per transect)
Abundance is calculated as the average number of individuals recorded per RLS transect, where present.