Stegastes obreptusWestern gregory
Similar to S. fasciolatus (Pacific Gregory) but with yellow tint to rear of body and fins, and black patch on front of dorsal fin, preceded by thin white streak. Latter difficult to see in adults with dorsal fin retracted. Blue margins on pelvic and anal fins but not as prominent as on S. apicalis (Yellow-tipped Gregory).
Max Size: 12 cm
Sea Temperature Range: 18.5-31.3°C
Habitat Generalization Index: 20.67
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 (38.3% 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 (8 per transect)
Abundance is calculated as the average number of individuals recorded per RLS transect, where present.
Edit by: RD Stuart-Smith, GJ Edgar, AJ Green, IV Shaw. 2015. Tropical Marine Fishes of Australia. Reed New Holland