Bicolor Angelfish Breeding Guide

Centropyge bicolor is a protogynous dwarf angelfish living in harems and spawning pelagically at dusk. Its planktonic larvae make home breeding impractical.

Overview

The bicolor angelfish (Centropyge bicolor), or oriole angelfish, is a dwarf angelfish of the Indo-Pacific (East Africa, southern Japan, Australia, the Philippines, Fiji), found at depths of 1-25 m on reef slopes, in coral areas, lagoons and near drop-offs. It lives 5-13 years in the wild. Home breeding is not established; the following describes documented wild reproduction.

Sexing

All individuals begin life as females, and the species is a protogynous hermaphrodite. A harem is dominated by one male over several females (about seven on average), ranked linearly by size; when the dominant male is removed the highest-ranking female changes sex over roughly 18-20 days.

Conditioning

No home conditioning protocol is documented. In the wild higher-ranking females spawn more frequently than lower-ranked ones, so social rank within the harem governs reproductive activity.

Spawning Behaviour & Trigger

The male visits females at dusk to mate, sometimes visiting one or several in a night, while each female spawns at most once per night. The female scatters eggs into the water and the male releases sperm to fertilise them.

Egg & Fry Care

Reproduction is pelagic: the eggs are released into open water and the larvae develop in the pelagic zone over a larval stage of about 32 days. There is no nest and no parental care, and rearing the planktonic larvae is not practical in a home aquarium.

Common Challenges

Although other Centropyge species such as the coral beauty have been captive-bred at specialist aquaculture facilities, that work depends on cultured rotifers and copepods. The bicolor angelfish's dusk pelagic spawning and planktonic larvae keep home reproduction out of reach.