Chromis opercularis
Doublebar chromis
Similar Species
Same Genus
Distribution
Tropical Indo-Pacific
Description
Narrow dark bar behind eye and wide dark bar behind head down onto pectoral fin base. C. xanthura (Pale-tail Puller) has white tail as adult, but juveniles almost identical, with long yellow tail lobes and blue body. Juveniles best distinguished by presence of adults or by location (Indian Ocean).
Information
Max Size: 16 cm
Sea Temperature Range: 25.3-31.3°C
Depth: 1-40m
Habitat Generalization Index: 7.71
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: Common (33.7% 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 (50 per transect)
Abundance is calculated as the average number of individuals recorded per RLS transect, where present.
Edit by: Rick S-S