The Threebanded Butterflyfish, Chaetodon humeralis, is a member of the Butterflyfish or Chaetodontidae Family, and is known in Mexico as mariposa muñeca. The Threebanded Butterflyfish is found in pairs or in small schools in and around rocky areas near shore at depths up to 107 m (350 feet). hey feed on algae and benthic invertebrates.