Dark blue body with paler blue head, with 2 dark blue lines forward from eye and another behind the mouth, crescent tail with elongated tips. Sometimes seen in large numbers feeding on plankton above the reef, but retreats into cracks when approached.

• Max Size: 50 cm
• Sea Temperature Range: 22.1-31.4°C
• Depth: 5-40 m
• Habitat: Coral Reef, Rocky Reef
• Habitat Generalisation Index: 3.9
  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: Not Evaluated
• Occurrence: Infrequent (9% 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: Large aggregations (173 per transect)
  Abundance is calculated as the average number of individuals recorded per RLS transect, where present.