Passer Angelfish

Passer Angelfish

The Passer Angelfish (Holacanthus passer), commonly called the king angelfish, is a large, robust marine angel from the Eastern Pacific. Adults are deep blue-grey with a bold vertical white bar behind the head, bright yellow tail and pelvic fins, and orange highlights, while juveniles wear additional bright bars. Hardy, long-lived and full of presence, it is a magnificent display fish for large fish-only and fish-with-hardy-coral aquariums.

Coming from cooler Eastern Pacific waters, it appreciates slightly lower temperatures than typical tropical reef fish.

Natural Habitat & Origin

Holacanthus passer is found in the Eastern Pacific, from the Gulf of California south along the coast of Central and South America, where it lives on rocky reefs, often in cooler, productive waters. Juveniles act as cleaners, and adults graze sponges, algae and other invertebrate matter over the reef, frequently in pairs or small groups.

In the aquarium it appreciates a large system with substantial live rock for grazing and territory, and cooler, stable temperatures.

Care Requirements

Maintain stable marine conditions: salinity around 1.024–1.026, pH 8.1–8.4, and a temperature toward the cooler end of the reef range, around 22–25°C (72–77°F), reflecting its origin. Reaching about 36 cm (14 inches), it needs a large tank — on the order of 570 litres (around 150 US gallons) or more — with strong filtration to handle its bioload. Buy a juvenile only if you can house a fish of this eventual size.

Diet & Feeding

The Passer Angelfish is an omnivore whose diet includes sponges, algae and other invertebrate matter. Base its feeding on quality marine angelfish preparations containing sponge, supplemented with herbivore foods, spirulina, frozen mysis and enriched marine blends. Offer several small meals a day and allow grazing on mature live rock.

Behavior & Temperament

This is a semi-aggressive, territorial fish, especially toward other angels. Keep only one large angel per system unless it is exceptionally big, and introduce it thoughtfully alongside robust tankmates. Though it can be shy when first added, it becomes a bold, dominant presence once settled.

Tank Mates

Suitable companions are other large, robust marine fish — tangs, large wrasses, triggers (with care) and similar — that can coexist with an assertive angel and tolerate cooler water. Avoid small, timid fish. It is generally not reef-safe: like most large angels it is likely to nip stony corals, soft corals and clam mantles, so it is best in fish-only or fish-with-hardy-coral systems.

Breeding

Holacanthus passer is a pelagic spawner and is not bred in the home aquarium, so trade specimens are wild-collected.

Common Health Issues

Given proper space, cooler water and good quality, the Passer Angelfish is hardy, but it is susceptible to marine ich (Cryptocaryon irritans) and marine velvet (Amyloodinium ocellatum), especially when stressed. The most common pitfall is underestimating its adult size. Quarantine new arrivals, maintain pristine, stable, slightly cooler water, and take this magnificent angel on only if you can meet its long-term space and dietary needs.