🐠 Koran Angelfish (Pomacanthus semicirculatus)
🐠 Koran Angelfish (Pomacanthus semicirculatus)
Marine Angelfish • Coral Grazer • Display Species • Indo-Pacific Beauty
📋 The Koran Angelfish (Pomacanthus semicirculatus) is one of the most recognizable and sought-after large angelfish in the aquarium trade. Its name comes from the semicircular blue patterns on juveniles that resemble Arabic script. As they mature, the blue lines fade into emerald-green body scales edged in sapphire blue, creating a sophisticated mosaic pattern accented by a yellow-tinged tail.
This Indo-Pacific species thrives in spacious, rock-rich aquariums where it can graze on sponges and algae. While not reef safe, it makes a stunning focal fish for FOWLR (Fish-Only-With-Live-Rock) systems. The Koran Angelfish is intelligent, bold, and regal — a perfect blend of color, character, and evolution in motion.
💡 Highlights
✨ Spectacular transformation: juvenile blue rings evolve into green-blue adult patterns
⚪ Striking adult coloration: emerald body with yellow tail and blue edging
📏 Large and commanding: grows up to 40 cm (16")
✅ Intelligent personality: recognizes keepers and explores rock structures
🐠 Timeless Indo-Pacific show fish: admired for decades in the hobby
🧾 A Quick Look at the Koran Angelfish
📛 Common Name: Koran Angelfish / Semicircle Angelfish / Blue Koran
🔬 Scientific Name: Pomacanthus semicirculatus
👨👩👧 Family: Pomacanthidae
🌍 Origin: Indo-Pacific • Thailand • Indonesia • Great Barrier Reef • Maldives
📏 Max Size: 40 cm (≈ 16")
💧 pH Range: 8.1 – 8.4
🌡️ Temperature Range: 24 – 28 °C (75 – 82 °F)
🧠 Care Level: Moderate to Advanced
💖 Temperament: Semi-aggressive
🪸 Reef Safe: ❌ No – nips corals and clams
🏠 Min Tank Size: 500 L (132 US gallons)
📌 Tank Level: Mid to lower water column
🧬 Captive Bred: ❌ No
🌿 Wild Caught: ✅ Yes – sustainably collected from Indo-Pacific reefs
⏳ Lifespan: 10 – 15 years
🍽️ Diet: Omnivore (sponges • tunicates • algae • small crustaceans)
🐣 Reproduction: Egg layer; forms monogamous pairs in the wild

















