The Oneknife unicornfish (Naso thynnoides) is a saltwater fish of the family Acanthuridae that grows up to 40 cm.
Description
The oneknife unicornfish is a surgeonfish from the Indo-West Pacific. The species grows to about 40 cm and has a streamlined, grey-blue body with fine cross-lines and, unlike some relatives, no forehead horn. On each side of the tail base it bears sharp bony keel plates that can cause cuts. It forms schools above outer reefs and eats zooplankton. The IUCN assesses the species as Least Concern (LC).
Frequently asked questions
How do you recognise the Oneknife unicornfish?
The Oneknife unicornfish has a torpedo-shaped body, is mainly blue and shows a vertical stripes pattern.
Where does the Oneknife unicornfish live?
The Oneknife unicornfish lives in the sea (marine waters) and is mostly found around stony or rocky ground.
How big does the Oneknife unicornfish get?
The Oneknife unicornfish grows to a maximum of about 40 cm. On average the species is around 25 cm.
Is the Oneknife unicornfish dangerous to humans?
The Oneknife unicornfish can cause injury; handle it with care.
Is the Oneknife unicornfish edible?
Yes, the Oneknife unicornfish is commonly eaten.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Naso
More from the family Acanthuridae
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