Sargocentron diadema

Crown squirrelfish | Barred Squirrelfish | Crowned Squirrelfish | Red Squirrelfish
Sargocentron diadema
Sargocentron diadema, Tanzania, Photo: Rick Stuart-Smith
Sargocentron diadema
Sargocentron diadema, QLD, Australia, Photo: Rick Stuart-Smith
Sargocentron diadema
Sargocentron diadema, (Night Phase) Cook Islands, Photo: Graham Edgar
Sargocentron diadema
Sargocentron diadema, NSW, Australia, Photo: Ian Shaw
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Sargocentron diadema
Sargocentron diadema
Sargocentron diadema
Sargocentron diadema


Tropical Indo-Pacific


Prominent narrow, red and white stripes along body, like many Sargocentron species (Squirrelfishes), but also has white tail base. White patch on tail base not as extensive as on S. caudimaculatum (Whitetail Squirrelfish) which lacks body stripes. Night phase has a white blotch on upper tail base rather than being completely white and a broad oblique white bar on back.


Max Size: 17 cm

Sea Temperature Range: 21.1-32.8°C

Depth: 1-60m

Habitat Generalization Index: 7.62

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: Infrequent (8.1% 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: Few (3 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