Orange-fin Anemonefish Breeding Guide

Breeding Amphiprion chrysopterus: sequential hermaphrodite pair formation, demersal eggs adhered to the substrate and guarded by the male, and rearing pelagic larvae on rotifers then Artemia.

Overview

Amphiprion chrysopterus is a large anemonefish reaching about 17 cm, found in the western Pacific from Queensland and New Guinea east to the Marshall and Tuamotu Islands, from the surface to about 20 m. It is a host generalist, recorded with seven anemone species including the bubble-tip anemone Entacmaea quadricolor, the magnificent sea anemone Heteractis magnifica and Mertens' carpet sea anemone Stichodactyla mertensii.

Sexing

Clownfish are sequential hermaphrodites: they develop into males first and become females when they mature, and only two fish per group, a male and a female, reproduce through external fertilization. Sex follows social rank, so raising juveniles together and allowing the largest to mature into the female is the standard route to a breeding pair.

Conditioning

A bonded pair held in a stable, warm reef and fed frequently on a varied diet comes into breeding condition. A host anemone such as Heteractis magnifica is readily accepted but is not strictly required for spawning in captivity.

Breeding Setup

The breeding setup provides a flat, defensible spawning surface such as rock within the pair's territory near any host anemone present. Because this is a large clownfish, the breeding tank should be sized to give the pair adequate space.

Spawning Behavior & Trigger

As an anemonefish it is a demersal substrate spawner: the eggs are demersal and adhere to the substrate, and they are fertilized externally on the prepared surface near the pair's territory. A settled pair under stable reef parameters and frequent feeding spawns in repeated cycles.

Egg & Fry Care

The males guard and aerate the eggs until they hatch. Larvae are pelagic and are reared in captivity on small live foods, starting with rotifers and moving to Artemia nauplii as the larvae grow.

Common Challenges

Species-specific egg counts and incubation figures are not documented, so breeders rely on the general anemonefish behavior. This is a large, assertive clownfish, so the breeding tank must give the pair space and limit harassment, and the planktonic larval phase still requires dense, correctly sized live food and stable water.