Surgeonfishes

Bluespine unicornfish (Naso unicornis)

The Bluespine unicornfish (Naso unicornis) belongs to the family Acanthuridae (surgeonfishes) and is found in the Red Sea, with a wider Indo-Pacific range. It is a herbivore and usually seen in small groups. It reaches about 50 cm and is found at 1–50 m depth. IUCN conservation status: Least Concern. It is not dangerous to divers.

Bluespine unicornfish (Naso unicornis), a Red Sea fish of the surgeonfishes family
Photo: iNaturalist / Wikimedia Commons

Quick facts

Scientific nameNaso unicornis
FamilySurgeonfishes (Acanthuridae)
Common name (IT)Pesce unicorno spine blu
Common name (EN)Bluespine unicornfish
Maximum size50 cm
Depth1–50 m
DistributionRed Sea and Indo-Pacific
IUCN statusLC — Least Concern

Description

Present throughout the Red Sea, with a broader range across the tropical Indo-Pacific.

Where it lives

Present throughout the Red Sea, with a broader range across the tropical Indo-Pacific.

  • Red Sea
  • Indo-Pacific

Frequently asked questions

What family does the Bluespine unicornfish belong to?
The Bluespine unicornfish (Naso unicornis) belongs to the family Acanthuridae (surgeonfishes).
Is the Bluespine unicornfish dangerous?
It is not dangerous to divers. As with any reef animal, do not touch or handle it.
Is the Bluespine unicornfish endemic to the Red Sea?
No — it occurs in the Red Sea but its range extends across the Indo-Pacific.
How big does the Bluespine unicornfish get?
It reaches a maximum length of about 50 cm.

Explore the Bluespine unicornfish in 3D in the interactive atlas →