Centropyge shepardi (Mango Angel) Breeding Guide
Centropyge shepardi is a Mariana Islands dwarf angel living in harems and spawning pelagic eggs at dusk. Home breeding is not feasible; this guide documents its real biology.
Overview
Centropyge shepardi has a restricted western Pacific range covering the Northern Mariana Islands, Guam and the Ogasawara Islands of southern Japan. It reaches about 9 cm at depths of roughly 10 to 56 m and is mainly herbivorous, with algae dominating its diet. Like the rest of the genus, it is not bred by hobbyists.
Sexing
As a protogynous dwarf angel, the species starts life as female, and the dominant female in a group changes to male if the male is lost. Functional sex is dictated by social rank, so there is no dependable way to sex juveniles by appearance.
Spawning Behavior & Trigger
Centropyge shepardi lives in harems of three to seven individuals. 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, use up the yolk sac within roughly three days, and then require extremely small first foods such as copepod nauplii because rotifers are too large for the first-feeding mouth. There is no parental care, and rearing larvae is the principal obstacle to captive production.
Common Challenges
- Pelagic eggs disperse on release and cannot be collected from a display.
- First-feeding larvae need live copepod nauplii rather than rotifers.
- Maintaining a stable harem in aquaria is hampered by dominance conflicts.
- Captive offspring exist only via commercial or research larviculture.