Chaetodon guentheri

Gunthers butterflyfish | Gunther's Butterflyfish | Chaetodon guntheri
Chaetodon guentheri
Chaetodon guentheri, adult, NSW, Australia, Photo: Ian Shaw
Chaetodon guentheri
Chaetodon guentheri, juvenile, NSW, Australia, Photo: Ian Shaw
Chaetodon guentheri
Chaetodon guentheri, NSW, Australia, Photo: Ian Shaw
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Chaetodon guentheri
Chaetodon guentheri
Chaetodon guentheri


Temperate Australasia, Tropical Indo-Pacific


Black stripe through the eye, fine purple spots on sides, yellow colouration at the rear of the body, and black and blue trim to the fins. Pearly white forebody grading to bright yellow on upper and rear of body, unlike C. citrinellus (Citron Butterflyfish), which is yellow all over and has black margin on anal fin.


Max Size: 18 cm

Sea Temperature Range: 16-26.2°C

Depth: 8-70m

Habitat Generalization Index: 6.74

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: Frequent (16.6% 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: GJ Edgar. 2008. Australian Marine Life. New Holland, Sydney