- any tropical marine fish of the family Chaetodontidae, having large, broad fins or brilliant coloration, or both.
- flying gurnard.
- a blenny, Blennius ocellaris, of Europe.
- any small tropical marine percoid fish of the genera Chaetodon, Chelmon, etc, that has a deep flattened brightly coloured or strikingly marked body and brushlike teeth: family Chaetodontidae