Centropyge eibli (Eibli's Angel) Breeding Guide
Centropyge eibli is a haremic, protogynous dwarf angel that spawns pelagic eggs at dusk. Home breeding is effectively impossible; this guide documents its real reproductive biology.
Overview
Centropyge eibli is a dwarf angelfish of the eastern Indian Ocean, ranging from the Maldives and Sri Lanka to north-western Australia and east to Flores in Indonesia. It reaches about 15 cm and grazes mainly on algae. Its colour pattern is closely matched by the juvenile Indian Ocean mimic surgeonfish Acanthurus tristis. Like other members of its genus, it is not bred by hobbyists; commercial and research larviculture is the only route to captive offspring.
Sexing
Centropyge eibli is a protogynous hermaphrodite: individuals mature as females, and the dominant female changes sex to male if the resident male disappears. There is no reliable external way to sex juveniles; functional sex is determined by social rank within the harem rather than by fixed colour differences.
Spawning Behavior & Trigger
In the wild the species lives in small harems of one male and several females. Across the genus, courtship begins in the late afternoon and culminates at dusk: the male performs lateral displays to each female, then a female ascends into the water column with the male nuzzling her vent. Hundreds of pelagic eggs are released near the top of the ascent. An oil globule in each egg carries it up to plankton-rich surface water.
Egg & Fry Care
Centropyge eggs are transparent, spherical and pelagic, on the order of 0.6-0.7 mm across in studied congeners. Larvae hatch tiny, resorb the yolk sac within roughly three days, and must then begin feeding on extremely small prey such as copepod nauplii; standard rotifers are too large for the minute first-feeding mouth. There is no parental care, and rearing the larvae is the principal obstacle to captive production.
Common Challenges
- Pelagic eggs disperse immediately and are not laid on a substrate, so they cannot be collected in a display tank.
- First-feeding larvae are too small for rotifers and require live copepod nauplii.
- Aggression between conspecific dwarf angels complicates forming a stable pair or harem.
- Producing offspring has only been achieved in dedicated commercial or research larviculture facilities.