Auriga Butterfly/ Threadfin Butterfly ( Chaetodon Auriga )
Chaetodon auriga, Forsskal 1775, the Threadfin Butterflyfish. A great beauty and hardy aquarium specimen, though it will eat coral polyps and anemones. With age, grows a trailing filament from the posterior dorsal fin. To eight inches long.
Feeds principally on sessile invertebrates, including cnidarians and algae. Threadfin Butterflyfish; so named for a trailing filament that grows from the posterior dorsal fin.
Some folks use this hardy species to rid their systems of pest anemones of the genus Aiptasia and is known to consume most Large Polyp Stony coral polyps, Feather Dusters and Fanworms as food.