An adult bignose unicornfish has a long, curved snout.
  • Size

    21.5 inches (55 cm)
  • Diet

  • Range

  • Habitat

    Deep lagoon and seaward reefs

Physical Characteristics

  • 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).

Animal Fact

Unicornfish are named for the bony horn on its face.

Diet / Feeding

  • Diet consists of zooplankton.
  • Feeds during the day above reef slopes.

Range / Habitat

  • 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.

Reproduction & Growth

  • Male is particularly colorful during courtship.

Conservation Status

  • “Not Evaluated” on the IUCN Red List.

Additional Information

  • Often solitary or in pairs as well as larger aggregations.
  • Able to quickly hide or reveal its brilliant blue markings.


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