Asfur Angelfish

Asfur Angelfish

The Asfur Angelfish (Pomacanthus asfur), also known as the Arabian or half-moon angelfish, is a large and spectacular marine angel from the Red Sea region. Its deep blue-black body is split by a bold, crescent-shaped yellow bar across the midsection, with a yellow tail completing the dramatic look. It is a confident, long-lived showpiece for big aquariums and one of the most sought-after angels from the western Indian Ocean.

Like other large angelfish, it combines hardiness and presence with a healthy appetite that includes sponges and, in captivity, the occasional coral — considerations that shape both its diet and its reef compatibility.

Natural Habitat & Origin

Pomacanthus asfur is found in the western Indian Ocean — the Red Sea and Gulf of Aden, south along East Africa to Zanzibar, and into the Persian Gulf. It frequents coral-rich reefs at depths of roughly 3 to 30 metres (10–98 feet), where it is a shy, cautious fish usually seen near caves and crevices that it can retreat into.

Captive specimens want the same security: a large aquarium with substantial live rock arranged into caves and overhangs, plus open water to patrol.

Care Requirements

Maintain stable marine conditions: salinity around 1.024–1.026, pH 8.1–8.4, and a temperature of about 24–26°C (75–79°F), with strong filtration to handle its bioload. Reaching up to about 40 cm (16 inches), it needs a very large tank — on the order of 700 litres (around 185 US gallons) as a sensible minimum, and more for a full-grown adult.

Buy a juvenile only if you can commit to housing a fish of this eventual size; cramped quarters lead to stress and poor health in large angels.

Diet & Feeding

The Asfur Angelfish is an omnivore whose natural diet is dominated by sponges and tunicates. In captivity, 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, which helps satisfy its natural browsing.

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 shy when first added, it becomes a bold, dominant presence once settled. It is a protogynous hermaphrodite, with the larger fish of a pair becoming male.

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. 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 suited to fish-only or fish-only-with-live-rock systems.

Breeding

Pomacanthus asfur is bred on a limited commercial scale, and captive-bred juveniles are occasionally available. In the wild it is a pelagic spawner; rearing the planktonic larvae is demanding and beyond the home aquarium, so most specimens remain wild-collected.

Common Health Issues

Given proper space and water quality, the Asfur Angelfish is fairly hardy, but it is susceptible to marine ich (Cryptocaryon irritans) and marine velvet (Amyloodinium ocellatum), especially when stressed by inadequate housing or transport. The most common real-world problem is keepers underestimating its adult size. Quarantine new arrivals, maintain pristine stable water, and take this magnificent angel on only if you can meet its long-term space and dietary needs.