Heniochus monoceros
Masked Bannerfish | Masked Coachman
Distribution
Temperate Australasia, Tropical Indo-Pacific
Description
Three dark brown bands, the first on head over eyes, the last diffuse and incomplete. Central dark brown band passes behind white dorsal fin filament. Body is otherwise white, gradating to yellow at the rear. Prominent protuberance on forehead, like H. singularis and H. varius, but has largely white and yellow anal fin rather than largely black. White dorsal pennant originates from the first white body bar, whereas it originates from the second white bar in H. singularis.
Information
Max Size: 24 cm
Sea Temperature Range: 20.5-30.8°C
Depth: 2-30m
Habitat Generalization Index: 8.98
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 (7.4% 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.
Edit by: Jo Schmid