The Japanese Masked Swallowtail is a graceful species that fares from the seas closer to Japan. They tend to inhabit deeper waters, which makes them relatively uncommon in the hobby. However, this means there are also considerable difficulties in bringing them up. Many new imports often suffer from swim bladder issues potentially associated with the barotrauma. However, once stabilized and feeding, these fish quickly become the centerpiece of any aquarium. The females have a ring of blue around their eyes and a ribbon of gold on their dorsal fins which slowly that fades to a silver. Black markings follow the curves of the tail and the face. The males, on the other hand, undergo a remarkable transition. They exchange the black markings for a spectacular golden mask that runs down the body and intricate stripes characteristic of the species. Like the other Genicanthus, these are completely reef safe and are very peaceful. Every specimen is feeding at our facility before they ship.