Neopomacentrus cyanomos

Regal Demoiselle | Crescent Damsel | Regal Damsel | Violet Damselfish | Violet Demoiselle | Yellow-tailed Damselfish
Neopomacentrus cyanomos
Neopomacentrus cyanomos, adult, Photo: Rick Stuart-Smith
Neopomacentrus cyanomos
Neopomacentrus cyanomos, adult, Photo: Rick Stuart-Smith
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Neopomacentrus cyanomos
Neopomacentrus cyanomos


Tropical Indo-Pacific


Slender dark body with white or yellow patch at base of rear dorsal fin, and black earspot. Localised colour variations of inner margin of tail and dorsal fins, which can be either transparent or yellow.


Max Size: 10 cm

Sea Temperature Range: 22.1-31.3°C

Depth: 1-30m

Habitat Generalization Index: 8.55

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 (15.2% 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: Many (73 per transect)

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