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Oneknife unicornfish

Naso thynnoides

  • Fish
  • IUCN: Least concern
  • Usual depth7–35 m
  • Water temperature26–30 °C
  • Best monthsMarch and June
  • How commonRare
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About this species

Naso thynnoides, the oneknife unicornfish, oneknife unicorn, thunny unicornfish, singlespine unicornfish, one-spine unicorn, or barred unicornfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This species is found in the Indo-Pacific.

Text from the Wikipedia article “Naso thynnoides”, licensed CC BY-SA 4.0. Read the article

Where and when

Where it has been recorded

Worldwide

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Best months

Worldwide (open data)

  • January: 0 records
  • February: 9 records
  • March: 18 records
  • April: 5 records
  • May: 2 records
  • June: 14 records
  • July: 3 records
  • August: 1 records
  • September: 5 records
  • October: 2 records
  • November: 1 records
  • December: 0 records

Depth and water temperature

Depth

Mostly recorded at 7–35 m · Deepest record: 65 m

  • 0–10 m: 10 records
  • 10–20 m: 20 records
  • 20–30 m: 5 records
  • 30–40 m: 7 records
  • 40–50 m: 0 records
  • 50–60 m: 0 records
  • 60–70 m: 2 records

Water temperature

Recorded in surface water of 26–30 °C

  • 24–26 °C: 1 records
  • 26–28 °C: 35 records
  • 28–30 °C: 44 records

Names and classification

English
Oneknife unicornfish, Barred Unicornfish, Barred Unicornfish, Oneknife unicornfish, oneknife unicorn, oneknife unicornfish, One-spine Unicorn, Singlespine Unicornfish, Thunny Unicornfish
Names in 2 more languages
French
Nason à rayures
Japanese
Bozuhagi, Bôzuhagi, ボウズハギ

Other scientific names: Axinurus thynnoides, Naso thynoides

Similar species

Sources and credits

Names and taxonomy: WoRMS (CC BY 4.0) and the GBIF Backbone (CC BY 4.0). Photos: iNaturalist observers, each under the licence shown (CC0, CC BY or CC BY-SA).

  • Depth, temperature, months and maps: records from OBIS and GBIF under CC0 or CC BY.
  • Descriptions: Wikipedia, licensed CC BY-SA, each linked to its article.
  • Conservation status as published by GBIF (IUCN Red List).
  • 186 open-data records from 1829 to 2023.

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