Ctenochaetus binotatus

Two-spot surgeonfish | Twospot Bristletooth | Twospot Surgeonfish
Ctenochaetus binotatus
Ctenochaetus binotatus, Bali, Indonesia, Photo: Ian Shaw
Ctenochaetus binotatus
Ctenochaetus binotatus, juvenile, Photo: Rick Stuart-Smith
Ctenochaetus binotatus
Ctenochaetus binotatus, Photo: Rick Stuart-Smith
Ctenochaetus binotatus
Ctenochaetus binotatus, Tanzania, Photo: Rick Stuart-Smith
Ctenochaetus binotatus
Ctenochaetus binotatus, juvenile, QLD, Australia, Photo: Rick Stuart-Smith
Ctenochaetus binotatus
Ctenochaetus binotatus, juvenile, NSW, Australia, Photo: Tom Davis
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Ctenochaetus binotatus
Ctenochaetus binotatus
Ctenochaetus binotatus
Ctenochaetus binotatus
Ctenochaetus binotatus
Ctenochaetus binotatus

Distribution

Tropical Indo-Pacific


Description

Brown body with pale lines, blue ring around eye, pale spots on head and chest, lunate tail and dark spots above and below tail base. Blue eye best distinguishes it from similar C. striatus (Lined Bristletooth), C. cyanocheilus (Yelloweye Bristletooth), Acanthurus nigrofuscus (Dusky Surgeonfish) and A. nigroris (Greyhead Surgeonfish). Very common.


Information

Max Size: 22 cm

Sea Temperature Range: 22-31.3°C

Depth: 8-53 m

Habitat Generalization Index: 26.06

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 (30.6% 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 (10 per transect)

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


Edit by: Joe Shields