Centropyge tibicen (Keyhole Angel) Breeding Guide
Centropyge tibicen is among the largest dwarf angels, living in harems and spawning pelagic eggs at dusk. Home breeding is not feasible; this guide documents its real biology.
Overview
Centropyge tibicen is an Indo-Pacific dwarf angelfish ranging from northwestern Australia and Christmas Island through the Indo-Australian Archipelago to Vanuatu and Tonga, north to southern Japan and Taiwan and to Lord Howe Island. At about 19 cm it is one of the largest members of its genus, living at depths between roughly 4 and 35 m on a mainly algal diet. It is not bred by hobbyists.
Sexing
The species is a sequential (protogynous) hermaphrodite: when a harem has no male, one of the females changes sex to take that role. As functional sex follows social position, there is no dependable external method to sex younger fish.
Spawning Behavior & Trigger
Centropyge tibicen lives in harems of three to seven fish. Reproduction follows the genus pattern: the male courts each female through the late afternoon, and at dusk a female ascends into the water column with the male nuzzling her vent before releasing pelagic eggs near the top of the rise. The eggs float upward on an oil droplet into surface plankton.
Egg & Fry Care
Eggs in this genus are transparent, spherical and about 0.6-0.7 mm across. Larvae hatch tiny, deplete the yolk sac within roughly three days, and then need extremely small first foods such as copepod nauplii because rotifers are too large for the first-feeding mouth. There is no parental care, and larval rearing is the decisive obstacle to captive production.
Common Challenges
- Pelagic eggs disperse on release and cannot be collected from a display.
- First-feeding larvae require live copepod nauplii rather than rotifers.
- Its larger size demands very large systems to hold a harem.
- Captive offspring exist only via commercial or research larviculture.