Ringtail Unicornfish (species: Naso annulatus) in Lizard Island area: all known taxa (Lizard Island Field Guide)
Lizard Island area: all known taxa > Animalia > Chordata > Vertebrata > Actinopterygii > Perciformes > Acanthuridae > Naso > Naso annulatus (gallery)
Naso annulatus
Ringtail Unicornfish


©Andy Lewis: Young Naso annulatus at the lagoon entrance, Lizard Island.

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Kingdom Animalia
Phylum Chordata
Class Actinopterygii
Order Perciformes
Family Acanthuridae
Genus Naso
Species Naso annulatus

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Lizard Island Field Guide
Lizard Island area: all known taxa

Colours

                   

Distinguishing features

Long tapering horn develops on forehead with size, starting when fish is about 20 cm long. No markings on head. Young with a white ring around tail peduncle. Adults develop long, trailing filaments on tail. Colour often olive/brown but can change rapidly to much paler blue/grey.

Size

  • From 2 cm to 100 cm (Length of specimen)

Depth range

  • Depth range data is not yet available.

Synonyms

Similar taxa

Distribution


©Atlas of Living Australia: Australian distribution

Web resources

References

References that assist with identification

  • Allen and M.V. Erdmann, G.R. (2012). Reef fishes of the East Indies. Volumes I-III in: Reef fishes of the East Indies. Tropical Reef Research, Perth, Australia. LIRS catalog number 90162.

Other references

  • Borden, W.C. (1998). Phylogeny of the unicornfishes (Naso, Acanthuridae) based on soft anatomy, Copeia, 1998(1): 104-113. LIRS catalog number 528.
  • Caley, M.J. (1991). Mechanisms of coexistence in communities of coral-reef fishes, Ph.D. thesis, University of Sydney. LIRS catalog number 307.
  • View all references