Family Chaetodontidae
| Scientific name | Chaetodon ephippium Cuvier, 1831 |
| Common name | SADDLEBACK BUTTERFLYFISH |
| Japanese name | Seguro-cho-cho-uo |
| Habitat | Coral reefs |
| Depth | To 100 feet |
| Diet | Coral polyps, benthic invertebrates, filamentous algae, and fish eggs |
| Size | 12 inches |
| Abundance | Rare in Hawaii but fairly common elsewhere |
| Distribution | Indo-Pacific east from Cocos-Keeling Island (Indian Ocean) |
| Notes | Forms pairs; skittish and difficult to photograph |
| Similar species |
