Mediaster brachiatus
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An illustration based on the real animal.
A little discovery to share.
The Udenaga sea star has tiny clam-shaped pincers on its back.
THE REAL WORLD
The real Mediaster brachiatus
- Scientific name
- Mediaster brachiatus
- Japanese name
- ウデナガゴカクヒトデ
- Group
- Ocean animals
- Class
- Asteroidea
- Order
- Valvatida
- Family
- Goniasteridae
- Genus
- Mediaster
It lives in the Kumano Sea, Sagami Bay, off the Boso Peninsula and in the Sea of Japan; in the Kumano Sea it lives in the deep sea.
How the Mediaster brachiatus lives
It lives on rocky reefs in Korean and Japanese waters.
국립해양생물자원관Basic data
- Range
- Kumano Sea, Sagami Bay, off the Boso Peninsula, and the Sea of Japan
Where the Mediaster brachiatus 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
- ウデナガゴカクヒトデ
- 简体中文
- 中腕角海星
- 繁體中文
- 中腕角海星
- 한국어
- 메디불가사리
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 — ウデナガゴカクヒトデChecked: 2026-11-04
- 국립해양생물자원관 — 메디불가사리 Mediaster brachiatusChecked: 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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