What is "chaetodon"

n. butterflyfish (of the genus ''Chaetodon'')

n. any fish of the genus Chaetodon

Chaetodon is a tropical fish genus in the family Chaetodontidae. Like their relatives, they are known as "butterflyfish". This genus is by far the largest among the Chaetodontidae, with about 90 living species included here, though most might warrant recognition as distinct genera.