Chromis dimidiata

Chocolate-dip chromis
Chromis dimidiata
Chromis dimidiata, Red Sea, Photo: Rick Stuart-Smith
Chromis dimidiata
Chromis dimidiata, Red Sea, Photo: Rick Stuart-Smith
1 / 2
Chromis dimidiata
Chromis dimidiata




This species is restricted to the Red Sea. Populations in the Indian Ocean are now considered a separate species, C. fieldi, which has a more curved demarcation between white and black parts of the body (such that the white often covers more of the dorsal spines).


Max Size: 9 cm

Sea Temperature Range: 21.5-32.9°C

Depth: 1-36 m

Habitat Generalization Index: 23.87

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: Widespread (81.3% 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 (193 per transect)

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