Wikipedia:Today's featured article/May 11, 2022

The queen angelfish (Holacanthus ciliaris) is a species of marine angelfish found in the western Atlantic Ocean. It is a warm-water species that lives near the ocean floor in coral reefs. It is blue and yellow and has a distinctive spot or "crown" on its forehead. This crown distinguishes it from the similar, closely related, Bermuda blue angelfish, with which it overlaps in range and can interbreed. Adult queen angelfish primarily eat sponges. They form harems of one male and up to four females. They live within a territory where the females forage separately and are tended to by the male. Breeding occurs near a full moon. The transparent eggs are pelagic and float in the water, hatching after 15 to 20 hours. Juveniles have different coloration than adults and act as cleaner fish. The queen angelfish is popular in the aquarium trade. In 2010, the fish was assessed as a least-concern species by the International Union for Conservation of Nature.