Japanese orange sea star
Amazing fact
The Japanese orange sea star lives in shallow seas with rocky shores and reefs.
新潟市水族館 マリンピア日本海
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An illustration based on the real animal.
A little discovery to share.
The Japanese orange sea star lives in shallow seas with rocky shores and reefs.
THE REAL WORLD
The real Japanese orange sea star
- Scientific name
- Certonardoa semiregularis
- Japanese name
- アカヒトデ
- Group
- Ocean animals
- Class
- Asteroidea
- Order
- Valvatida
- Family
- Ophidiasteridae
- Genus
- Certonardoa
A sea star that lives in seas south of the Kii Peninsula and around the Ogasawara Islands.
A sea snail called akahitode-yadorinina and a crustacean called akahitode-shidamushi live on it as parasites.
Basic data
- Range
- South of the Kii Peninsula and the Ogasawara Islands
Where the Japanese orange sea star 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
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 — アカヒトデChecked: 2026-11-04
- 新潟市水族館 マリンピア日本海 — アカヒトデChecked: 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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