Chaetodon trifascialis

Chevron butterflyfish | Acropora Butterflyfish | Right-angled Butterflyfish | Triangulate Butterflyfish | V-lined Butterflyfish
Chaetodon trifascialis
Chaetodon trifascialis, adult, NSW, Australia, Photo: Ian Shaw
Chaetodon trifascialis
Chaetodon trifascialis, juvenile, North WA, Australia, Photo: Andrew Green
Chaetodon trifascialis
Chaetodon trifascialis, Night colours. NSW, Australia, Photo: Graham Edgar
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Chaetodon trifascialis
Chaetodon trifascialis
Chaetodon trifascialis


Tropical Indo-Pacific


Elongate pale body, dark chevron markings, black tail with yellow rear margin. Light edged black band on face through eye. Juvenile has black band on rear of body dorsal and anal fins, yellow tail base and ventral fins.


Max Size: 18 cm

Sea Temperature Range: 19.1-31.2°C

Depth: 2-30m

Habitat Generalization Index: 17.58

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: Near Threatened

Occurrence: Common (29.2% 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: 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