Pomacanthus semicirculatus
We'll contact you when this item is back in stock
Currently Out of Stock
Check back soon or contact us for availability
The Koran Angelfish (Pomacanthus semicirculatus), also called the Semicircle Angel, is a dramatic showpiece known for its stunning transformation from juvenile to adult. Young fish display bold electric-blue rings; adults develop a rich green-gold body with blue edging and a distinctive “semicircle” pattern on the tail. Expect a confident, semi-aggressive personality best suited to large, mature systems with plenty of live rock for grazing and hideaways. This species reaches up to ~15″ and thrives long-term in 180–220+ gallon aquariums. Offer a varied omnivorous diet with angelfish formulas that include marine sponge, plus mysis, chopped seafood, nori, and high-quality pellets. Not reef safe—may nip LPS, zoanthids, and clam mantles—so it’s ideal for FOWLR or carefully curated displays.
The Koran Angelfish require very large aquariums, with 180 gallons or more recommended for adults. A mature system with extensive live rock, caves, and swim-throughs is essential to accommodate their size and territorial behavior. They should be housed singly and paired with larger, assertive tank mates such as tangs, triggers, or large wrasses. Rockwork should be sturdy and well-secured, as adults are powerful swimmers. Due to their tendency to nip corals, this species is best kept in FOWLR setups, where space, structure, and stability allow them to thrive long term.
The Koran Angelfish are omnivores with a strong preference for sponge-based foods. In the wild, they consume sponges, tunicates, algae, and small invertebrates. In captivity, they should be offered a varied diet including angelfish preparations with sponge content, marine algae, frozen mysis shrimp, enriched seafood blends, and high-quality pellets. A diverse diet supports coloration, growth, and overall health.