Holacanthus passer (King Angelfish): Breeding Guide

Holacanthus passer is an Eastern Pacific angelfish that spawns daily as monogamous pairs. It was the second Holacanthus bred in captivity, at a specialist facility, not at home.

Overview

Holacanthus passer is a large Pomacanthidae angelfish of the Eastern Pacific, ranging from the Gulf of California to Peru including the Galapagos Islands. FishBase records a maximum of about 35.6 cm and a depth range of 4 to 30 m. Adults graze on sessile invertebrates, specialising on sponges, with juveniles showing cleaning behaviour.

Sexing

FishBase notes protogyny has been proposed for this species but awaits confirmation, and describes both facultative and social monogamy. Reliable visual sexing is not documented; functional pairs are identified by behaviour.

Spawning Behavior & Trigger

FishBase reports that pairs spawn daily throughout the lunar cycle and do not defend an exclusive territory. Spawning is a pelagic broadcast event releasing eggs and milt into open water, consistent with the genus.

Egg & Fry Care

Eggs and larvae are planktonic. Reef Builders reports that Bali Aquarich spawned and raised H. passer in captivity, calling it the first for the species and second for the genus; broodstock pairs of passer and clarionensis were held in the same water body, each already pair-bonded to its own kind, and juveniles were photographed one month post-settlement.

Common Challenges

Even at fingerling size the species shows the intraspecific aggression typical of large angels, with light sparring reported despite ample space. Combined with pelagic larvae that need hatchery plankton culture, this restricts breeding to specialist aquaculture rather than home aquariums.