Chaetodon flavirostris

Dusky butterflyfish
Chaetodon flavirostris
Chaetodon flavirostris, NSW, Australia, Photo: Rick Stuart-Smith
Chaetodon flavirostris
Chaetodon flavirostris, juvenile, NSW, Australia, Photo: Tom Davis
Chaetodon flavirostris
Chaetodon flavirostris, Photo: Rick Stuart-Smith
1 / 3
Chaetodon flavirostris
Chaetodon flavirostris
Chaetodon flavirostris


Tropical Indo-Pacific


Small hump on top of the head. Uniformly dark body with rounded yellow dorsal and anal fins with dark margin and an orange stripe running through both fins across tail base, tail also yellow with dark margin. Yellow band at base of snout, in front of eye. Juveniles pale grey with yellow tail, dorsal and anal fins.


Max Size: 20 cm

Sea Temperature Range: 17.8-29.2°C

Depth: 2-30m

Habitat Generalization Index: 24.71

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: Common (29.7% 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