Mottled spinefoot
Amazing fact
As a mottled spinefoot grows, the notch in its tail fin becomes deeper.
National Museum of Nature and Science
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An illustration based on the real animal.
A little discovery to share.
As a mottled spinefoot grows, the notch in its tail fin becomes deeper.
THE REAL WORLD
The real Mottled spinefoot
- Scientific name
- Siganus fuscescens
- Japanese name
- アイゴ
- Group
- Ocean animals
- Order
- Perciformes
- Family
- Siganidae
- Genus
- Siganus
It lives along the coasts from Aomori to Kyushu, and around the Izu, Ogasawara and Ryukyu Islands.
How the Mottled spinefoot lives
Young fish feed mainly on zooplankton. Adults eat mainly algae, along with other foods. In the Seto Inland Sea, some groups arrive on warm currents. Some stay in the Seto Inland Sea through the seasons.
新潟市水族館 マリンピア日本海広島県Basic data
- Range
- Sea of Japan, East China Sea and Pacific coasts from Aomori to southern Kyushu, Izu Islands, Ogasawara Islands, and Ryukyu Islands
Where the Mottled spinefoot 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
- アイゴ
- 简体中文
- 褐蓝子鱼
- 繁體中文
- 褐臭肚魚
- 한국어
- 독가시치
- Français
- Sigan à taches bleues
- Deutsch
- Gesprenkelter Kaninchenfisch
- Português (Brasil)
- Peixe-coelho-verde
- Italiano
- Pesce coniglio chiazzato
- Bahasa Indonesia
- Baronang susu
- Русский
- Тёмный сиган
- ไทย
- ปลาใบขนุน
Names come from Wikidata and iNaturalist records. Where a language has no recorded name, we use the scientific name.
Sources and how we check
- 鳥羽水族館 — アイゴChecked: 2026-11-04
- 新潟市水族館 マリンピア日本海 — アイゴChecked: 2026-11-07
- 広島県 — アイゴChecked: 2026-11-07
- National Museum of Nature and Science — Siganus fuscescensChecked: 2026-11-07
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.
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