Common name: King Angelfish

General Information

The King Angelfish, scientifically known as Holacanthus passer, is a striking marine fish known for its vibrant coloration and bold personality. This species is a popular choice among aquarists who are captivated by its regal appearance and dynamic behavior. Native to the Eastern Pacific, the King Angelfish is commonly found from the Gulf of California to Peru, including the Galapagos Islands.

In the aquarium trade, the King Angelfish is valued for its stunning blue and orange coloration, with a distinctive white vertical stripe running down its body. This species is known for its hardiness and adaptability, making it a desirable addition to large marine aquariums. However, its size and temperament require careful consideration by potential owners.

Care

King Angelfish require spacious aquariums with plenty of swimming space and hiding spots. A tank of at least 500 liters is recommended to accommodate their active nature and territorial tendencies. The aquarium should be equipped with robust filtration and stable water parameters to support their health and well-being.

These angelfish thrive in environments that mimic their natural habitat, which includes rocky reefs and coral-rich areas. Providing a variety of live rock structures will not only offer hiding places but also grazing surfaces for natural feeding behaviors.

Diet and Feeding

In the wild, King Angelfish are omnivorous, feeding on a mix of algae, sponges, and small invertebrates. In captivity, they should be offered a varied diet that includes high-quality marine angelfish preparations, spirulina, mysis shrimp, and finely chopped seafood. Regular feeding of marine algae and sponge-based foods will help maintain their vibrant coloration and overall health.

Feed King Angelfish two to three times daily, ensuring they receive a balanced diet. Overfeeding can lead to water quality issues, so monitor their intake and adjust portions as necessary.

Behavior and Compatibility

King Angelfish are known for their semi-aggressive temperament, particularly towards other angelfish and similarly shaped species. They are best kept as the sole angelfish in a tank unless housed in very large aquariums with ample space to establish territories.

While they can coexist with a variety of other marine species, caution should be exercised when introducing them to community tanks. Suitable tank mates include larger, robust fish that can hold their own, such as tangs and wrasses. Avoid housing them with smaller, more timid species that may be bullied.

Reproduction

Breeding King Angelfish in captivity is challenging and not commonly achieved. They are pelagic spawners, releasing eggs and sperm into the water column. Successful breeding requires precise environmental conditions and often occurs in large, specialized facilities rather than home aquariums.

Health and Common Issues

King Angelfish are generally hardy but can be susceptible to common marine diseases such as ich and marine velvet. Maintaining optimal water quality and a varied diet is crucial for preventing illness. Quarantine new additions and monitor for signs of stress or disease.

Habitat

In the wild, King Angelfish inhabit rocky reefs and coral-rich areas, often at depths ranging from 3 to 30 meters. They are found in the Eastern Pacific, from the Gulf of California to Peru, including the Galapagos Islands. These environments are characterized by warm waters and abundant coral and rock formations, providing ample grazing opportunities and shelter.