Rhinecanthus rectangulus

Wedge-tail triggerfish | Black-banded Triggerfish | Rectangle Triggerfish | Rectangular Triggerfish | Reef Triggerfish | Saddle-shoe Fish | Wedge Picassofish
Rhinecanthus rectangulus
Rhinecanthus rectangulus, adult, NW Australia, Photo: Ian Shaw
Rhinecanthus rectangulus
Rhinecanthus rectangulus, juvenile, NSW, Australia, Photo: Tom Davis
Rhinecanthus rectangulus
Rhinecanthus rectangulus, Tonga, Photo: Graham Edgar
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Rhinecanthus rectangulus
Rhinecanthus rectangulus
Rhinecanthus rectangulus


Tropical Indo-Pacific


Differs from other Rhinecanthus species (picasso triggerfishes) in having large black oblique patch from eye to anal fin, black arrowhead patch at tail base, and 2 thin yellow chevron markings on rear body.


Max Size: 30 cm

Sea Temperature Range: 22.9-30.7°C

Depth: 10-20m

Habitat Generalization Index: 5.73

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: Not Evaluated

Occurrence: Infrequent (2.9% 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.