Chromis atrilobata, Galapagos Islands, Ecuador, Photo: Graham Edgar
Chromis atrilobata, Nicaragua, Photo: Rick Stuart-Smith
Tropical Eastern Pacific
Oval-shaped, light brown body, black scissor tail, black stripe on rear of dorsal fin, black spot at pectoral fin base, and a white spot at base of rear of dorsal fin. Forms aggregations in mid water above the reef, feeding on zooplankton.
Max Size: 13 cm
Sea Temperature Range: 21.3-30.3°C
Habitat: Coral Reef, Rocky Reef
Habitat Generalisation Index: 25
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: Climate change/warming, Exploitation
IUCN Threat Status: Least Concern
Occurrence: Widespread (60% 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: Large aggregations (387 per transect)
Abundance is calculated as the average number of individuals recorded per RLS transect, where present.