Three-spot Angelfish

Geographical Origin and Habitat: Indo-Pacific: widely distributed from the coasts of East Africa and the Red Sea to Samoa, reaching north to southern Japan and south to the Great Barrier Reef and New Caledonia. It inhabits coral-rich outer reef slopes, vertical drop-offs, and areas with strong currents, at depths between 10 and 80 meters.

Taxonomy and Morphology: Belongs to the family Pomacanthidae, genus Apolemichthys. Features a discoid, laterally compressed body, with a maximum adult size of about 25 centimeters. It has a small mouth equipped with tiny flexible teeth adapted for scraping the substrate. It is characterized by a robust preopercular spine typical of angelfish.

Social Behavior: Solitary species or lives in pairs or small harems consisting of one male and several females. It is a territorial fish that patrols a vast rocky area in search of food. In the aquarium, it shows marked intraspecific territoriality, while generally ignoring fish belonging to other families.

Coloration and Sexual Dimorphism: Characterized by a beautiful bright lemon-yellow coloration over the entire body. The lips are of a distinctive electric or neon blue color. It displays three dark spots on the head: one on the forehead and one near each gill cover. The anal fin has a wide black lower margin. There is no visible sexual dimorphism.

Aquarium Setup: Requires a large and mature marine aquarium, with a minimum volume of 350-400 liters for a single specimen. The tank must be set up with a complex rock barrier rich in caves, arches, and wide passages to allow the fish to swim freely and find shade. It is essential that the aquarium is established for several months.

Diet and Feeding: Omnivorous with a preference for sponges and tunicates. In the aquarium, it can be difficult to acclimate to dry food at first. It must be fed high-quality frozen foods (such as mysis, krill, brine shrimp), specific angelfish preparations containing marine sponges, and fresh vegetables (spirulina, nori). Feed several times a day.

Water Quality: Stable and high-quality marine parameters: temperature between 24 and 28 °C, stable pH between 8.1 and 8.4, and density at 1.020-1.025. To preserve its health and prevent infections, strong filtration with an efficient skimmer and regular water changes are essential to keep nitrates very low.

Compatibility and Cohabitation: Can cohabit with active and robust fish (such as surgeonfish, wrasses, damselfish). Cohabitation with other angelfish is risky and not recommended unless in giant tanks. It is not considered entirely reef-safe as it tends to nip the polyps of hard corals (LPS and SPS) and clam mantles, especially if not well fed.

Aquarium Breeding: Oviparous reproduction with pelagic spawning. In nature, spawning occurs at dusk. There are no cases of successful breeding in home aquariums due to the extreme delicacy of the planktonic larvae and the difficulty of providing them with specific live food.

Risks and Diseases: It is a sensitive fish that is highly affected by transport stress and fluctuations in water values. It can easily contract Ichthyo or Oodinium infections and lateral line disease (HLLE) if the diet lacks vitamins. A long quarantine period and enriched feeding are essential before introduction.