Sapphire Damsel (Pomacentrus pavo) Breeding Guide

Pomacentrus pavo is an oviparous Indo-Pacific damselfish that lays demersal eggs on the substrate, guarded and aerated by the male. Pelagic larvae make home rearing difficult.

Overview

Pomacentrus pavo, the sapphire damsel, is a widely distributed Indo-Pacific damselfish ranging from East Africa to the Tuamotu Islands, north to Taiwan and south to Lord Howe Island, reaching about 8.5 cm standard length. FishBase classes it as oviparous with distinct pairing during breeding, following the family's demersal-spawning, male-guarded pattern. IUCN assessed it as Least Concern in 2021.

Sexing

No reliable external sexing character is documented for P. pavo in the consulted sources. As in related damselfishes, the nest-tending male is identified behaviourally during reproduction rather than by colour, and the species is broadly monomorphic.

Conditioning

A species-specific conditioning protocol is not documented. P. pavo feeds on zooplankton and filamentous algae (trophic level about 3.0) and occupies sandy lagoon reefs, patch reefs and rubble; a varied marine diet supports condition. Maintain stable reef parameters within the recorded ranges (temperature about 24–26 °C, pH 8.1–8.4).

Breeding Setup

Provide open sand-and-rubble areas around rock or coral heads, echoing the species' natural sandy lagoon and patch-reef habitat, so a male can establish a defensible nest patch. Following the family pattern, the male clears an area of algae and invertebrates to form the nest. Space and broken sightlines moderate territorial aggression.

Spawning Behavior & Trigger

Specific spawning triggers for P. pavo are not documented. In Pomacentridae, ritualised courtship precedes spawning; the female lays a string of sticky eggs attached to the substrate and the male fertilises them externally. FishBase confirms the eggs are demersal and adhere to the substrate and that males guard and aerate them.

Egg & Fry Care

The male guards and aerates the clutch through incubation. At family level, eggs hatch over about two to seven days into transparent larvae roughly 2–4 mm long that disperse into a pelagic phase. This planktonic stage is the principal barrier to captive reproduction.