   thumb|clown fish swimming movements thumb|right|a clownfish swimming. thumb|right|video of a clownfish swimming around an anemone. clownfish or anemonefish are fishes from the subfamily amphiprioninae in the family pomacentridae. thirty species are recognized, one in the genus premnas, while the remaining are in the genus amphiprion. in the wild, they all form symbiotic mutualisms with sea anemones. depending on species, clownfish are overall yellow, orange, or a reddish or blackish color, and many show white bars or patches. the largest can reach a length of , while the smallest barely can reach . ==ecology and habitat== clownfish are native to warmer waters of the indian and pacific oceans, including the great barrier reef and the red sea. while most species have restricted distributions, others are widespread. clownfish live at the bottom of shallow seas in sheltered reefs or in shallow lagoons. there are no clownfish in the atlantic. ==diet== clownfish are omnivorous and can feed on undigested food from their host anemones, and the fecal matter from the clownfish provides nutrients to the sea anemone. clownfish primarily feed on small zooplankton from the water column, such as copepods and tunicate larvae, with a small portion of their diet coming from algae, with the exception of amphiprion perideraion, which primarily feeds on algae.{{cite journal|last=porat|first=d.|author2=chadwick-fur
Pomacentridae Symbiosis