Common name: Keyhole Angelfish

General Information

The Keyhole Angelfish, scientifically known as Centropyge tibicen, is a striking addition to any saltwater aquarium. Known for its distinctive black body adorned with a white "keyhole" marking, this species is both beautiful and intriguing. Originating from the Indo-Pacific region, the Keyhole Angelfish is a favorite among aquarists due to its manageable size and captivating appearance.

In the wild, these angelfish are often found in coral-rich lagoons and outer reef slopes, where they graze on algae and small invertebrates. Their adaptability to various tank conditions and their relatively peaceful nature make them a popular choice for hobbyists looking to add a splash of elegance to their marine setups.

Care

Keyhole Angelfish require a well-established aquarium with plenty of live rock for grazing and hiding. They thrive in tanks with stable water conditions and a variety of hiding spots to mimic their natural reef habitat. While they are generally hardy, maintaining good water quality is essential to their health.

These angelfish are best kept in tanks of at least 200 liters (around 50 gallons) to provide ample swimming space and territory. They can coexist with other peaceful fish but may become territorial with other dwarf angelfish, especially in smaller tanks.

Diet and Feeding

Keyhole Angelfish are omnivores, with a natural diet consisting of algae, sponges, and small invertebrates. In captivity, they should be fed a varied diet that includes high-quality marine angelfish preparations, spirulina, mysis shrimp, and finely chopped seafood.

Feeding them small portions two to three times a day will help maintain their health and vibrant coloration. Providing a balanced diet is crucial to prevent nutritional deficiencies and promote their well-being.

Behavior and Compatibility

The Keyhole Angelfish is generally peaceful but can exhibit semi-aggressive behavior, particularly towards other angelfish. They are best kept with non-aggressive tank mates and should be introduced to the aquarium before more territorial species.

While they are not considered reef-safe, they may nip at coral polyps and sessile invertebrates, so caution is advised when housing them in reef tanks. Providing plenty of live rock and hiding places can help reduce stress and aggression.

Reproduction

Breeding Keyhole Angelfish in captivity is challenging and not commonly achieved. They are known to form pairs in the wild, but replicating their natural breeding conditions in an aquarium setting is difficult. Successful breeding typically requires a dedicated setup and specific environmental conditions.

Health and Common Issues

Keyhole Angelfish are susceptible to common marine diseases such as ich and marine velvet. Maintaining optimal water quality and a stress-free environment can help prevent these issues. Regular monitoring and prompt treatment of any signs of illness are essential to their care.

When selecting a Keyhole Angelfish, look for vibrant colors and active behavior. Avoid individuals with signs of stress or disease, such as clamped fins or labored breathing.

Habitat

The Keyhole Angelfish is native to the Indo-Pacific region, including areas such as the Great Barrier Reef, the Coral Sea, and the waters surrounding Fiji and Tonga. They inhabit coral-rich environments, often found in lagoons and outer reef slopes.

These angelfish prefer habitats with abundant live rock and coral formations, which provide both food and shelter. Replicating these conditions in captivity is key to their health and happiness.