Acanthurus bahianus

Acanthuridae
Ocean Surgeon, Ocean Surgeon, Grey Doctorfish, Barber, Ocean Surgeonfish, Ocean Tang, Ringtail, Shitty Trooper, Doctorfish
  • Acanthurus bahianus, Abrolhos, Bahia, Brazil, Photo: Graham Edgar
    Acanthurus bahianus, Abrolhos, Bahia, Brazil, Photo: Graham Edgar
Distribution
Tropical Atlantic/Caribbean
Description
Olive-brown body, oblique blue stripe from snout to eye, an arc of sort blue stripe behind rear edge of eye, and black rear edge of gill cover. Outer tail margin yellow, rather than white/blue as in A. tractus, with which this species was previously grouped. This species only southern Atlantic, and not known from the Caribbean.
Information
  • Max Size: 38 cm
  • Sea Temperature Range: 22.3-30.9°C
  • Depth: 2-40m
  • Habitat: Coral Reef, Rocky Reef, Seagrass
  • Habitat Generalisation Index: 24.1
    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
  • Threats: Exploitation, Habitat degradation
  • IUCN Threat Status: Least Concern
  • Occurrence: Common (26% 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 (16 per transect)
    Abundance is calculated as the average number of individuals recorded per RLS transect, where present.
Edit by: Rick S-S
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