Common name: Japanese Swallow

General Information

The Japanese Swallow, scientifically known as Genicanthus semifasciatus, is a stunning species that has captured the hearts of marine aquarium enthusiasts. Known for its elegant appearance and peaceful nature, this angelfish is a popular choice among hobbyists looking to add a touch of grace to their tanks. This species is native to the Western Pacific, particularly around Japan, which is reflected in its common name.

Unlike many other angelfish, the Japanese Swallowtail is considered reef-safe, making it an excellent addition to community reef tanks. Its unique beauty is characterized by a sleek body with a series of vertical black stripes on a silvery-white background, complemented by a striking yellow tail. The sexual dimorphism in this species is quite pronounced, with males displaying more vivid colors and patterns compared to females.

Care

The Japanese Swallow is relatively easy to care for, making it suitable for aquarists with moderate experience. It thrives in well-maintained aquariums with stable water conditions. A tank of at least 400 liters (around 100 gallons) is recommended to provide ample swimming space and to accommodate its active nature.

These angelfish appreciate a tank setup that mimics their natural reef habitat, with plenty of live rock for grazing and hiding spots. They are known to be quite active and enjoy exploring their environment, so providing a spacious and dynamic tank layout will help keep them engaged and healthy.

Diet and Feeding

In the wild, the Japanese Swallow primarily feeds on plankton and small invertebrates. In captivity, they should be offered a varied diet to ensure they receive all the necessary nutrients. High-quality marine pellets, frozen mysis shrimp, and brine shrimp are excellent choices. Including spirulina and other algae-based foods can also help meet their dietary needs.

Feed them small portions several times a day to mimic their natural grazing habits and to maintain optimal health. This feeding routine will also help in enhancing their vibrant colors.

Behavior and Compatibility

The Japanese Swallow is known for its peaceful temperament, making it a great candidate for community tanks. They can coexist harmoniously with other peaceful species and are less likely to exhibit aggression compared to many other angelfish species.

While they are generally reef-safe, caution should be taken when housing them with small invertebrates, as they might occasionally nip at them. However, their behavior is typically not detrimental to corals, making them a safer choice for reef setups.

Reproduction

Breeding the Japanese Swallow in captivity is challenging and not commonly achieved. They are pelagic spawners, releasing eggs and sperm into the water column. Successful breeding requires a large, well-established tank with pristine water conditions and a stable environment.

Health and Common Issues

The Japanese Swallow is generally hardy, but like all marine species, it is susceptible to common marine diseases such as ich and velvet. Maintaining high water quality and a stress-free environment is crucial in preventing these issues.

When selecting a Japanese Swallow, look for individuals with clear eyes, smooth scales, and active behavior. Regular health checks and a balanced diet will help ensure their long-term health and vitality.

Habitat

The natural habitat of the Japanese Swallow includes coral-rich areas and rocky reefs. They are typically found at depths ranging from 10 to 40 meters (33 to 131 feet). Their distribution is primarily around the waters of Japan, although they can also be found in other parts of the Western Pacific.

In captivity, replicating their natural environment with plenty of live rock and stable water parameters is key to their well-being.