Whitemargin unicornfish
Amazing fact
Whitemargin unicornfish sometimes fight over territory with others of their own species.
葛西臨海水族園
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An illustration based on the real animal.
A little discovery to share.
Whitemargin unicornfish sometimes fight over territory with others of their own species.
THE REAL WORLD
The real Whitemargin unicornfish
- Scientific name
- Naso annulatus
- Japanese name
- ヒメテングハギ
- Group
- Ocean animals
- Order
- Perciformes
- Family
- Acanthuridae
- Genus
- Naso
A member of the surgeonfish family. It has a long, horn-like projection above its eyes and is called a unicornfish in English.
Young fish have no horn; it grows longer as the fish grows. What the horn is for is not well understood.
Near the base of its tail it has knife-sharp spines, which it uses to defend itself, for example when another animal is about to attack.
How the Whitemargin unicornfish lives
It lives on coral reefs and rocky reefs. It eats plankton in the water.
葛西臨海水族園Basic data
- Size
- Total length: 50 cm
- Diet
- Plankton
- Range
- Pacific south of Sagami Bay and the Indian Ocean
Where the Whitemargin unicornfish has been recorded
Records: GBIF.org (CC0 and CC BY 4.0 records, retrieved 2026-11-07). Map: Natural EarthSee the records on GBIF
Watch wild animals from a distance. Do not touch or feed them, and take care of the places where they live.
Names around the world
- 日本語
- ヒメテングハギ
- 简体中文
- 突角鼻鱼
- 繁體中文
- 環紋鼻魚
- 한국어
- 작은뿔표문쥐치
- Français
- Nason à bordures blanches
- Deutsch
- Weißband-Nashornfisch
- Português (Brasil)
- Peixe-unicórnio-de-margem-branca
- Italiano
- Pesce unicorno margine bianco
- العربية
- وحيد القرن
Names come from Wikidata and iNaturalist records. Where a language has no recorded name, we use the scientific name.
Sources and how we check
- 葛西臨海水族園 — ヒメテングハギChecked: 2026-11-03
We check each fact against its source. The illustrations simplify how the real animal looks.
The classification (class, order, family, genus) follows Wikidata records, checked against GBIF. Classifications can change as research goes on.
The basic data are the values given in each source. They vary with how the animal is measured, whether it is male or female, and whether it lives in the wild or in captivity.
This page was translated from the original Japanese with the help of AI.
Report a mistakeEXHIBIT INFORMATION
Places that keep or show the Whitemargin unicornfish
Zoos, aquariums and other places whose official websites say they keep or show this animal.
Kanto
Displays can change with the animals’ health and the seasons. Check each facility’s official website before you go.
RELATIVES
Others in Acanthuridae
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