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Common Clownfish can grow up to approximately 11 cm in length.
These clownfish are found in the Indo-Pacific Ocean, specifically in the regions between Thailand, Northwest Australia, Singapore and Taiwan.
Clownfish are the only species of fish that live among the tentacles of sea anemones—other fish would be stung by the anemone, but clownfish secrete a mucus over their entire bodies that makes the anemone think it is in contact with itself and therefore prevents it from stinging. This is a symbiotic relationship between the anemones and the clownfish, as the fish are protected from predators, and the anemone is maintained by the clownfish, which keeps it parasite-free and well-fed. Anemones that provide homes for clownfish are typically found in warm, shallow waters, and clam lagoon areas.
Clownfish eat a variety of creatures that are usually left over from their host anemones, including zooplankton, copepods and isopods.
Predators to clownfish include larger fish, sharks, and rays.
Common Clownfish are protandrous hermaphrodites, meaning that all clownfish are born with active male reproductive organs as well as dormant female reproductive organs. If a female dies, the dominant male in the hierarchy will change into a female, and a secondary male will become the dominant male. Females generally lay their 100 to 1,000 eggs in an area close to the anemone where they reside, then males care for the eggs by keeping them clear of debris, protecting them from predators such as other fish, and by fanning them with their fins. After four to five days, the eggs hatch, at which point the young clownfish spend about two weeks drifting around in the sea before finding a host anemone..
Although the IUCN has not yet classified this fish species, clownfish are susceptible to several threats including unsustainable fisheries practices, loss of habitat, ocean acidification, and increasing water temperatures
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