Sebae Clownfish Breeding Guide

Breeding Amphiprion sebae: protandrous pair formation, demersal spawning near the host, male-tended eggs, hatching in 6 to 8 days, and rearing pelagic larvae on rotifers then Artemia.

Overview

Amphiprion sebae is a larger anemonefish reaching about 14 cm in length, distributed across the northern Indian Ocean from Java to the Arabian Peninsula, including India, Sri Lanka, the Maldives, Sumatra and the Andaman Islands. In the wild it is normally found with the saddle anemone Stichodactyla haddoni. Like other anemonefish it is a sequential hermaphrodite, and it has been bred in captivity, with captive-bred specimens offered in the marine aquarium trade.

Sexing

The species is a protandrous hermaphrodite with a strict size-based dominance hierarchy: only the largest fish becomes the female. Sex follows social rank rather than fixed birth sex, so the most reliable way to obtain a pair is to raise two juveniles together and allow the larger one to mature into the female while the smaller settles into the role of breeding male.

Conditioning

A bonded pair held in stable, warm reef conditions and fed frequently on a varied diet comes into spawning condition. A host anemone such as Stichodactyla haddoni is readily accepted but is not strictly required for spawning in captivity, where a flat surface near the pair's territory serves as the nest site.

Breeding Setup

The breeding system provides a flat, defensible spawning surface, such as rock or a tile, positioned within the pair's territory near any host anemone present. Captive breeding of this species has been documented, including a study that reared the fish in estuarine water, indicating tolerance of a range of conditions when stable water quality is maintained.

Spawning Behavior & Trigger

Following the anemonefish pattern, the female enters the prepared nest to lay her eggs, which are fertilized externally and adhere to the substrate. About 300 to 600 eggs are laid per clutch. A settled pair under stable parameters and frequent feeding spawns in repeated cycles.

Egg & Fry Care

The male usually guards the eggs, fanning and cleaning them throughout incubation. The eggs hatch in 6 to 8 days. The larvae are pelagic and are reared in captivity on small live foods, beginning with rotifers and progressing to Artemia nauplii; metamorphosis occurs between roughly the fifteenth and eighteenth day of the larval life cycle.

Common Challenges

As with all clownfish, the planktonic larval stage is the principal hurdle, demanding a continuous supply of correctly sized live food and excellent, stable water quality through the first weeks. Because this is one of the larger anemonefish, the breeding tank must also give the pair sufficient space and limit harassment from tankmates.