Family Chaetodontidae
Pennant Butterflyfish, Koko Head Wall, Oahu, 40 feet |
Juvenile Pennant Butterflyfish, Makua, Oahu, 30 feet |
| Scientific name | Heniochus diphreutes Jordan, 1903 |
| Common name | PENNANT BUTTERFLYFISH |
| Japanese name | Mure-hatatatedai |
| Habitat | Open water near ledges and walls |
| Depth | 50 to 700 feet |
| Diet | Feeds upon zooplankton high above the reef |
| Size | 7 inches |
| Abundance | Fairly common in areas exposed to strong currents |
| Distribution | Cooler waters of the Indo-Pacific and Red Sea; Hawaii, Japan, Australia, New Zealand, Indonesia, New Guinea, Philippines, Maldives, Mascarenes, South Africa |
| Notes | Forms large aggregations; large scales distinguish it from the Moorish Idol |
| Similar species | Heniochus acuminatus, Zanclus cornutus |
