Symbiotic mutualism between clown fish and sea anemone

Clownfish live in symbiosis with sea anemones. Sea anemones provide shelter for clownfish, and clownfish help repel butterfly fish that try to eat the anemone's tentacles. However, recent research has shown that clownfish secrete digestive substances that can be used by sea anemones as essential nutrients and instead, clownfish can nest between the anemone's stinging tentacles for protection. Clownfish also remain active at night, moving and flicking their fins. This habit serves to provide air circulation for sea anemones at night when oxygen levels are low where the photosynthesis process has stopped. The body size of the clown fish in the adult phase ranges from 14 to 16 cm, in some literature it can reach 18 cm. These fish make plankton and algae as food so they are classified as omnivores. These fish live in colonies, where in the early stages of growth all fish are male. When entering the reproductive phase, one of them will change gender into a female. After laying eggs, the male fish is in charge of guarding the eggs until the juvenile stage.