Acanthurus tractus
Five-band surgeonfish
Acanthurus tractus, Bonaire, Photo: Rick Stuart-Smith
Acanthurus tractus, Belize, Photo: Rick Stuart-Smith
Acanthurus tractus, Bonaire, Photo: Rick Stuart-Smith
Acanthurus tractus, Providence, Colombia, Photo: Graham Edgar
Similar Species
Same Genus
Distribution
Tropical Atlantic/Caribbean
Description
Previously considered A. bahianus, but now separated based on genetics and the colour of the tail margin. Also distinguished by location, this species known from the Caribbean and north, A. bahianus from Brazil and southern Atlantic.
Information
Max Size: 38 cm
Sea Temperature Range: N/A
Depth: N/A
Habitat Generalization Index: N/A
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: Not Evaluated
Occurrence: Common (25.7% 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: Rick S-S