Genicanthus semifasciatus, commonly known as the Japanese Swallowtail Angelfish, is a strikingly patterned marine angelfish species prized for its peaceful temperament and reef compatibility. This listing features female specimens available in various sizes, perfect for hobbyists seeking to add elegance and colour to their mature marine aquariums.
Care Level: Moderate – best suited for aquarists with some experience in maintaining stable marine environments.
Temperament and Compatibility: Genicanthus semifasciatus females are generally peaceful and non-aggressive, making them suitable tank mates for other peaceful fish species. They can be kept in reef aquariums as they are reef safe, posing no threat to corals or invertebrates.
Diet: Omnivorous – offer a varied diet including high-quality marine angelfish pellets, frozen mysis shrimp, brine shrimp, and marine algae to ensure optimal health and vibrant coloration.
Minimum Tank Size: A minimum of 150 litres (approximately 40 US gallons) is recommended to provide sufficient swimming space and maintain water quality.
Lighting and Water Flow: Standard marine aquarium lighting and moderate water flow are suitable for this species. Avoid overly intense lighting or strong currents that may stress the fish.
Placement: Provide ample open swimming areas along with live rock structures for shelter and grazing. This species appreciates a well-established tank with stable water parameters.
Origin: Native to the Western Pacific, particularly around Japan and nearby regions.
Maximum Size: Females typically reach up to 15 cm (6 inches) in length.
Adding a female Genicanthus semifasciatus to your marine aquarium will bring a unique and elegant presence. Ensure consistent water quality, a balanced diet, and peaceful tank mates to enjoy this species’ full potential.



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