Gray Angelfish (Pomacanthus arcuatus): Breeding Guide
Pomacanthus arcuatus is a large Western Atlantic angel that lives in monogamous home-ranging pairs and broadcasts pelagic eggs into open reef water. Its drifting larvae cannot be reared at home, so this guide covers wild reproduction, not a captive method.
Overview
Pomacanthus arcuatus, the Gray angelfish, is a Western Atlantic species found from New England south to the vicinity of Rio de Janeiro, including the Gulf of Mexico and Caribbean. FishBase lists a maximum total length of about 60 cm, a common length near 45 cm, and a depth range of roughly 2 to 60 m.
Adults eat mainly sponges along with tunicates, algae, zoantharians, gorgonians, hydroids, bryozoans and seagrasses, so the species is not reef-safe, while juveniles act as part-time cleaners. Sexual maturity occurs at around 22.6 cm.
Sexing
There is no reliable external colour difference between the sexes. As with related Pomacanthus, pairs are typically formed by raising fish together rather than by visual sexing, and the genus is generally protogynous.
Spawning Behavior & Trigger
FishBase describes the Gray angelfish as monogamous and always found in home-ranging pairs that do not defend an exclusive territory, a notable contrast with the strongly territorial French angelfish. Spawning is oviparous: the paired fish rise into the water column together to release eggs and sperm.
Detailed timing for P. arcuatus is not given in the consulted sources, but related large angels spawn at dusk, so twilight is the expected trigger.
Egg & Fry Care
The eggs are pelagic and float up into the plankton, hatching into minute larvae adapted to open-water drift. They depend on natural ocean micro-plankton during a long pelagic phase.
This open-water strategy leaves no nest to tend and no easily collected clutch, and the consulted sources report no home-rearing of this species.
Common Challenges
- Eggs are broadcast and dispersed, leaving nothing for an aquarist to guard or move.
- Larvae require micro-plankton first foods unavailable in aquaria.
- Adults grow very large, up to about 60 cm, so a suitable breeding system is impractical for hobbyists.