Description:

Dorsal spines: 13; Dorsal rays: 14-15; Anal spines: 2; Anal rays: 15–16.
Ovoid-bodied, moderately laterally compressed small damsel fish. Large eyes. Soft dorsal and anal fin angular with pointed rear tips. Broad peduncle. Emarginate to slightly forked caudal fin with rounded lobes. 
Colour. Upper body and dorsal fin electric blue, posterior soft dorsal fin transitioning to yellow with blue dots. Lower flank, ventral surface and pelvic fin yellow. Pectoral fin hyaline. Anal fin yellow with blue stripe. Peduncle and caudal fin yellow. 
 

Size:

Maturity: Lm unknown. Range unknown. Max Length: 10cm TL. 

Habitat and Ecology:

Inhabit lagoon and outer reef slopes, usually over rubble near base of reefs (depth 0-20m). The specimens photo’d here were in a shallow rock pool. Usually seen singly or in pairs. Territorial. Feed on zooplankton and algae. Oviparous, distinct pairing during breeding. Eggs are demersal and adhere to the substrate. Males guard and aerate the eggs.

Fishery Status:

This species is not protected or subject to fishery regulations. It is not known to be caught in any fishery, its small size making it not prone to current fishing techniques. 

Notes:
References:

Froese, R. & D. Pauly. Eds. 2019. FishBase. https://www.fishbase.se/summary/Pomacentrus-caeruleus.html (12/07/19).

Sutton, A. (2014). Caerulean Damsel Fish. https://seaunseen.com/caerulean-damsel-fish/ (12/07/19).

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