Gracila albomarginata

Thinspine Grouper | Masked Grouper | Red-edged Rockcod | Rededged Cod | Slenderspine Grouper | Thinspine Rockcod | White-margined Grouper | White-square Grouper
Gracila albomarginata
Gracila albomarginata, Bouganville Reef, Coral Sea, Photo: Graham Edgar
Gracila albomarginata
Gracila albomarginata, Photo: Rick Stuart-Smith
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Gracila albomarginata
Gracila albomarginata

Similar Species


Tropical Indo-Pacific


Grey-green body with a blue-edged dark mask over eye, white tail base with central black spot (can be darkened), large grey to white saddle on a black back, and sides often with slightly curved dark bars. Juvenile bright purple and similar to Pseudanthias species (Basslets), with red dorsal and anal fins and upper and lower tail margins. Length to 40 cm.


Max Size: 40 cm

Sea Temperature Range: 25.6-31.2°C

Depth: 6-120m

Habitat Generalization Index: 1.54

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: Data Deficient

Occurrence: Infrequent (4.8% 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: Solitary (1 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.

Edit by: Joe Shields