Chaetodon striatus

Banded butterflyfish | Butterbun | Butterflyfish | Portugese Butterfly | School Mistress | Banded Mariposa
Chaetodon striatus
Chaetodon striatus, adult, Bonaire, Photo: Rick Stuart-Smith
Chaetodon striatus
Chaetodon striatus, juvenile, Abrolhos, Bahia, Brazil, Photo: Graham Edgar
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Chaetodon striatus
Chaetodon striatus


Temperate South America, Temperate northern Atlantic, Tropical Atlantic/Caribbean


Pale yellowish body with two broad dark bars on body, another on rear of dorsal fin onto tail base, and another over eye. Broad dark sub-marginal bands on median fins and pelvic fins half black.


Max Size: 16 cm

Sea Temperature Range: 23-30.6°C

Depth: 3-55m

Habitat Generalization Index: 7.78

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 (19.3% 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: Joe Shields