Heniochus singularius

Singular Bannerfish | Heniochus singularis
Heniochus singularius
Heniochus singularius, adult, Aceh, Indonesia, Photo: Ian Shaw
Heniochus singularius
Heniochus singularius, Bali, Indonesia, Photo: Graham Edgar
Heniochus singularius
Heniochus singularius, Photo: Rick Stuart-Smith
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Heniochus singularius
Heniochus singularius
Heniochus singularius


Temperate Australasia, Tropical Indo-Pacific


Mainly black with a diffuse white bar in middle of body, and a white bar on head behind eye. Dorsal fin yellow except for a short white pennant on leading edge. Horn-like projection on forehead. Distinguished from H. monoceros (Masked Bannerfish) by dark anal fin and less distinct bars on the body.


Max Size: 30 cm

Sea Temperature Range: 22.3-31.4°C

Depth: 2-250m

Habitat Generalization Index: 4.09

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: Least Concern

Occurrence: Infrequent (6.8% 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: Few (2 per transect)

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