Stegastes apicalis

Yellow-tip gregory | Australian Gregory | Orange-tipped Gregory | Yellow-tipped Gregory
Stegastes apicalis
Stegastes apicalis, adult, NSW, Australia, Photo: Ian Shaw
Stegastes apicalis
Stegastes apicalis, adult, Coombe Is, Great Barrier Reef, QLD, Photo: Andrew Green
Stegastes apicalis
Stegastes apicalis, adult, NSW, Australia, Photo: Ian Shaw
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Stegastes apicalis
Stegastes apicalis
Stegastes apicalis

Distribution

Tropical Indo-Pacific


Description

Dark with distinctive orange margin to dorsal fin and upper tailfin, and blue margin to pelvic and anal fins. Juveniles with large dark ocellus on front of dorsal fin which shrinks with age to become just a small black spot in adults. Usually found close to holes and other shelter on the top of shallow reef crests, and rubble or patch reef areas of lagoons.


Information

Max Size: 15 cm

Sea Temperature Range: 19.8-30.2°C

Depth: 1-5m

Habitat Generalization Index: 12.74

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: Frequent (13.2% 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 (9 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