Threespot angelfish

The threespot angelfish belongs to the family Pomacanthidae. It usually lives in pairs or small groups on the slopes of coral reefs in the Indo-Pacific. In the angelfish family (Pomacanthidae), the female releases her eggs directly into the open water (pelagic spawning). Shortly after spawning, the male releases his sperm, which fertilizes the eggs. The eggs then drift with the ocean current until the larvae hatch and settle near the reef. Juveniles are more commonly found 25 m below the sea surface, while adult fish are found at shallower depths.

Within the angelfish family, harem structures are common, in which a dominant male lives with several females. Many species are also protogynous hermaphrodites, meaning they first reach sexual maturity as females and can later become males. This is also assumed to be the case for the other species in the genus Apolemichthys, but has been confirmed for the threespot angelfish.