Clarion Angelfish

Geographical Origin and Habitat: Endemic to the Revillagigedo Islands, particularly Clarion Island, off the Pacific coast of Mexico. Inhabits clear water rocky reefs and outer reef slopes exposed to strong oceanic currents.

Taxonomy and Morphology: Member of the Pomacanthidae family. Possesses a deeply compressed oval body with a sharp preopercular spine characteristic of Holacanthus. Grows to a maximum length of 20 cm.

Social Behavior: Solitary and highly territorial as an adult. Juveniles sometimes act as cleaners for larger fish. Displays high intraspecific aggression.

Coloration and Sexual Dimorphism: Juveniles are bright orange with vertical blue bands. Adults lose most of their bands, becoming brilliant orange-gold with olive-brown shading on the posterior body, outlined in electric blue. No sexual dimorphism.

Aquarium Setup: Needs a tank of at least 500 liters with robust rockwork forming caves and territories to reduce stress. A wide open swimming area is also required.

Diet and Feeding: Specialized omnivore. Primarily feeds on sponges, tunicates, and algae in the wild. Provide high-quality commercial sponge-based angelfish foods, sheet algae, and frozen mysis.

Water Quality: Requires pristine water and high oxygen levels. Maintain temperature at 22-26°C, pH 8.1-8.4, and salinity at SG 1.020-1.025. Strong skimming is necessary.

Compatibility and Cohabitation: Avoid keeping with other large angelfish or similarly colored species. Peaceful yet active tankmates like tangs and wrasses are suitable.

Aquarium Breeding: Extremely rare in captivity. They are pelagic spawners that release eggs into the water column during dusk.

Risks and Diseases: Prone to marine ich (Cryptocaryon) and Head and Lateral Line Erosion (HLLE) if water quality or diet is subpar.