Bowtie Damselfish (Neoglyphidodon melas) Breeding Guide

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

Overview

Neoglyphidodon melas, the bowtie damselfish, is a large Indo-West Pacific damselfish ranging from the Red Sea and East Africa to the western Pacific, reaching about 18 cm total length. Adults are near-black and inhabit soft-coral areas, on which they feed; juveniles are striking yellow and black. FishBase records 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 N. melas in the consulted sources, and the dramatic colour change is age-related. As in related damselfishes, the nest-tending male is identified behaviourally during reproduction.

Conditioning

A species-specific conditioning protocol is not documented. Adults feed on soft corals and are often found near giant clams (Tridacna), while juveniles associate with branching Acropora. Because it feeds on soft corals it is not reef-safe. 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 rock in a coral-rich, reef-style layout, giving a male a defensible nest patch. Following the family pattern, the male clears an area of algae and invertebrates before spawning. Because adults are large and aggressive, generous space and broken sightlines reduce conflict; note that the species will graze soft corals.

Spawning Behavior & Trigger

Specific spawning triggers for N. melas 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.