Chaetodon mertensii, Adult, Lord Howe Is, Australia, Photo: Andrew Green
Chaetodon mertensii, Juvenile, NSW, Australia, Photo: Ian Shaw
Chaetodon mertensii, Adult, NSW, Australia, Photo: Ian Shaw
Temperate Australasia, Tropical Indo-Pacific
Black chevron markings on white, with yellow-orange rear body, white tail base and black band through eye. C. xanthurus in SE Asia has netted pattern on sides.
Max Size: 13 cm
Sea Temperature Range: 19.1-29.5°C
Habitat: Coral Reef, Rocky Reef
Habitat Generalisation Index: 25.7
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
Threats: Exploitation, Habitat degradation
IUCN Threat Status: Least Concern
Occurrence: Common (20% 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.