Acanthurus triostegus

Acanthuridae
Convict Surgeonfish, Convict Tang, Convictfish, Five-banded Surgeonfish
  • Acanthurus triostegus, WA, Australia, Photo: Rick Stuart-Smith
    Acanthurus triostegus, WA, Australia, Photo: Rick Stuart-Smith
  • Acanthurus triostegus, WA, Australia, Photo: Rick Stuart-Smith
    Acanthurus triostegus, WA, Australia, Photo: Rick Stuart-Smith
  • Acanthurus triostegus, Juvenile, In rockpool, NSW, Australia, Photo: Ian Shaw
    Acanthurus triostegus, Juvenile, In rockpool, NSW, Australia, Photo: Ian Shaw
  • Acanthurus triostegus, North WA, Australia, Photo: Andrew Green
    Acanthurus triostegus, North WA, Australia, Photo: Andrew Green
Distribution
Temperate Australasia, Tropical Eastern Pacific, Tropical Indo-Pacific
Description
Pale yellow body crossed by five thin black bands, the first passing obliquely through eye, additional broken band on tail base. Sometimes aggregate in huge schools that graze across shallow reefs.
Information
  • Max Size: 27 cm
  • Sea Temperature Range: 21.0-30.9°C
  • Depth: 0-90m
  • Habitat: Coral Reef, Rocky Reef, Soft sediment
  • Habitat Generalisation Index: 23.5
    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
Rarity
  • IUCN Threat Status: Least Concern
  • Occurrence: Infrequent (8% 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: Many (33 per transect)
    Abundance is calculated as the average number of individuals recorded per RLS transect, where present.
Edit by: Joe Shields
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