Siganus canaliculatus

White-spotted spinefoot
Siganus canaliculatus
Siganus canaliculatus, Dampier, WA, Photo: Rick Stuart-Smith


Tropical Indo-Pacific


A review by Hsu published in 2011 has confirmed this species to be a colour variation of the widespread Siganus fuscescens. The World Register of Marine Species (WoRMS) does not yet reflect this update, listing these as separate species. They will remain separate in the RLS database until updated in WoRMS.


Max Size: 30 cm

Sea Temperature Range: N/A

Depth: N/A

Habitat Generalization Index: N/A

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: Frequent (12.9% 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: Many (75 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.