Angelfish Koran (Pomacanthus Semicirculatus) - Juvenile Form
Koran Angelfish (Pomacanthus semicirculatus) - Juvenile Form
The juvenile Koran Angelfish is renowned for its mesmerizing and complex color pattern, which is significantly different from its adult form. It features a deep navy-to-black body adorned with numerous concentric, semi-circular white and electric-blue stripes. These intricate markings often resemble Arabic script, which is how the species earned its common name. As the fish grows, these curves will gradually straighten and fade as it transitions into its adult coloration.
Key Information
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Common Name: Juvenile Koran Angelfish, Semicircle Angelfish, Half-circled Angelfish
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Scientific Name: Pomacanthus semicirculatus
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Origin: Indo-West Pacific (Red Sea to Fiji and Australia)
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Max Size: 35–40 cm (Adult size)
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Lifespan: Up to 20 years with proper care
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Temperament: Semi-aggressive; more reclusive than adults
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Diet: Omnivore – mysis shrimp, vitamin-enriched brine shrimp, and high-quality pellets
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Care Level: Moderate
Water Parameters
Temperature: 22–28°C (72–82°F)
pH: 8.1–8.4
Hardness: 8–12 dKH
Specific Gravity: 1.020–1.025
Minimum Tank Size: 380L+ (Grow-out); 680L–1000L+ (Final adult tank)
Behaviour & Tank Compatibility
Juvenile Koran Angelfish are generally more shy and reclusive than adults, often seeking shelter within the rockwork when startled. While they are relatively peaceful toward non-angelfish, they are highly territorial toward other members of their genus and should be kept singly. They are not reef-safe, as they will instinctively nip at soft corals, stony corals, and clam mantles as part of their natural foraging behavior.
Ideal Tank Setup
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Rockwork: Requires ample live rock with numerous small caves, cracks, and overhangs to provide essential security.
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Foraging Space: Thrives in an established system with natural microalgae growth to encourage grazing.
-
Filtration: Needs strong filtration and a high-performance protein skimmer to maintain the pristine water quality necessary for healthy growth.
-
Oxygenation: Prefers moderate water flow and high dissolved oxygen levels.
-
Stable Environment: High sensitivity to fluctuations in water parameters; consistent monitoring is required.
Why Choose the Koran Angelfish (Juvenile)?
Starting with a juvenile Koran Angelfish allows the hobbyist to witness one of the most famous biological "metamorphoses" in the marine hobby. The transition from the "Arabic script" swirls to the speckled, dusky green of the adult is a fascinating long-term project. They are considered one of the hardier large angelfish species, making them an excellent choice for intermediate keepers with the space to accommodate their significant eventual size.
Description
Koran Angelfish (Pomacanthus semicirculatus) - Juvenile Form
The juvenile Koran Angelfish is renowned for its mesmerizing and complex color pattern, which is significantly different from its adult form. It features a deep navy-to-black body adorned with numerous concentric, semi-circular white and electric-blue stripes. These intricate markings often resemble Arabic script, which is how the species earned its common name. As the fish grows, these curves will gradually straighten and fade as it transitions into its adult coloration.
Key Information
-
Common Name: Juvenile Koran Angelfish, Semicircle Angelfish, Half-circled Angelfish
-
Scientific Name: Pomacanthus semicirculatus
-
Origin: Indo-West Pacific (Red Sea to Fiji and Australia)
-
Max Size: 35–40 cm (Adult size)
-
Lifespan: Up to 20 years with proper care
-
Temperament: Semi-aggressive; more reclusive than adults
-
Diet: Omnivore – mysis shrimp, vitamin-enriched brine shrimp, and high-quality pellets
-
Care Level: Moderate
Water Parameters
Temperature: 22–28°C (72–82°F)
pH: 8.1–8.4
Hardness: 8–12 dKH
Specific Gravity: 1.020–1.025
Minimum Tank Size: 380L+ (Grow-out); 680L–1000L+ (Final adult tank)
Behaviour & Tank Compatibility
Juvenile Koran Angelfish are generally more shy and reclusive than adults, often seeking shelter within the rockwork when startled. While they are relatively peaceful toward non-angelfish, they are highly territorial toward other members of their genus and should be kept singly. They are not reef-safe, as they will instinctively nip at soft corals, stony corals, and clam mantles as part of their natural foraging behavior.
Ideal Tank Setup
-
Rockwork: Requires ample live rock with numerous small caves, cracks, and overhangs to provide essential security.
-
Foraging Space: Thrives in an established system with natural microalgae growth to encourage grazing.
-
Filtration: Needs strong filtration and a high-performance protein skimmer to maintain the pristine water quality necessary for healthy growth.
-
Oxygenation: Prefers moderate water flow and high dissolved oxygen levels.
-
Stable Environment: High sensitivity to fluctuations in water parameters; consistent monitoring is required.
Why Choose the Koran Angelfish (Juvenile)?
Starting with a juvenile Koran Angelfish allows the hobbyist to witness one of the most famous biological "metamorphoses" in the marine hobby. The transition from the "Arabic script" swirls to the speckled, dusky green of the adult is a fascinating long-term project. They are considered one of the hardier large angelfish species, making them an excellent choice for intermediate keepers with the space to accommodate their significant eventual size.
