Common name: Pitcairn angelfish

General information

The Swallowtail Angelfish, scientifically known as Genicanthus spinus, is a striking species known for its unique sexual dimorphism. Males and females exhibit different color patterns, with males typically displaying a more vibrant appearance. This species is part of the Genicanthus genus, which is notable for its members' elongated finnage and peaceful demeanor compared to other angelfish.

Care

Swallowtail Angelfish are considered moderate to care for. They require a well-established aquarium with plenty of swimming space and live rock for grazing. A varied diet of marine algae, spirulina, mysis shrimp, and other high-quality angelfish preparations is essential for their health and coloration. They are generally reef-safe but may nip at some soft corals and clam mantles.

Reproduction

In the wild, Swallowtail Angelfish form harems consisting of one male and several females. They are broadcast spawners, releasing eggs and sperm into the water column where fertilization occurs. Captive breeding is challenging but possible with a large, well-maintained system and stable group dynamics.

Habitat

Genicanthus spinus is found in the Western Pacific, typically in deep reef environments. They are often observed in areas with strong currents, which they use to their advantage when feeding on plankton. Their natural depth range is from 40 to over 150 meters, making them a deep-reef species.

Hobbyists should aim to replicate their natural habitat by providing ample water flow and a stable environment to thrive in the home aquarium.