Size21.5 inches (55 cm)
HabitatDeep lagoon and seaward reefs
- Adult has a long, curved snout with tall anal and dorsal fins.
- Has vertical blue lines running along the side of the body.
- Maximum length of 21.5 inches (55 cm).
Unicornfish are named for the bony horn on its face.
- Diet consists of zooplankton.
- Feeds during the day above reef slopes.
- Occurs in the Indo-Pacific from East Africa to the Line, Marquesan and Tuamoto Islands; north to Southern Japan, south to the Southern Great Barrier Reef and New Caledonia. It also is encountered throughout Micronesia.
- Found in deep lagoon and seaward reefs to depths of 164 feet (50 m).
- Usually appears in mid-water aggregations above reef slopes.
- Common around shipwrecks.
- Male is particularly colorful during courtship.
- “Not Evaluated” on the IUCN Red List.
- Often solitary or in pairs as well as larger aggregations.
- Able to quickly hide or reveal its brilliant blue markings.
- Coral Reef Fishes. Lieske, E. and Myers, R., pg.128