Common name: Koran Angelfish

General Information

The Koran Angelfish, scientifically known as Pomacanthus semicirculatus, is a striking species popular among marine aquarium enthusiasts. Known for its vibrant coloration and unique pattern, this angelfish is a captivating addition to any large saltwater aquarium. Juveniles display a mesmerizing blue and white semicircular pattern, which gradually transforms into a more subdued but equally beautiful adult coloration of greenish-blue with yellowish spots.

In the aquarium trade, the Koran Angelfish is appreciated for its beauty and relatively hardy nature, making it a sought-after species for experienced aquarists. However, due to its size and specific care requirements, it is not recommended for beginners.

Care

The Koran Angelfish requires a spacious aquarium with plenty of live rock for grazing and hiding. A tank of at least 500 liters is recommended to accommodate its size and swimming needs. This species thrives in a well-maintained environment with stable water parameters and good water quality.

To mimic its natural habitat, the aquarium should include ample rockwork and caves, providing shelter and territory for the angelfish. This setup not only offers security but also encourages natural behaviors such as grazing on algae.

Diet and Feeding

In the wild, the Koran Angelfish is omnivorous, feeding on a variety of algae, sponges, and small invertebrates. In captivity, a varied diet is essential to meet its nutritional needs. Offer a mix of high-quality marine angelfish preparations, spirulina, mysis shrimp, and finely chopped seafood. Supplementing with marine algae and sponge-based foods will help maintain its health and vibrant coloration.

Feed the Koran Angelfish two to three times daily, ensuring it receives a balanced diet. Monitor its intake to prevent overfeeding and maintain water quality.

Behavior and Compatibility

Koran Angelfish are known for their semi-aggressive temperament, particularly towards other angelfish and similar species. They are best kept as the only angelfish in the tank unless the aquarium is exceptionally large. Providing ample space and hiding spots can help reduce territorial disputes.

While they can coexist with a variety of tank mates, avoid housing them with overly aggressive species or those that may outcompete them for food. They are generally reef-safe with caution, as they may nip at coral polyps or invertebrates.

Reproduction

Breeding Koran Angelfish in captivity is challenging and rarely achieved. They are pelagic spawners, releasing eggs and sperm into the water column. Successful breeding requires precise conditions and often involves professional aquarists or specialized facilities.

Health and Common Issues

With proper care, Koran Angelfish can live for several years in captivity. Maintaining optimal water quality and a balanced diet is crucial to their health. Regular observation for signs of stress or illness, such as changes in coloration or behavior, is important.

Common health issues include marine ich and bacterial infections, often linked to poor water quality or stress. Quarantine new additions and maintain a clean environment to minimize risks.

Habitat

The Koran Angelfish is native to the Indo-Pacific region, inhabiting coral reefs and lagoons. It is commonly found in areas with abundant coral growth, where it can graze and find shelter. These environments offer the warm, stable conditions that the species thrives in, with plenty of crevices and overhangs for exploration.