Japanese Sea Biscuit
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An illustration based on the real animal.
A little discovery to share.
The cake urchin may look spineless, but it has small spines.
THE REAL WORLD
The real Japanese Sea Biscuit
- Scientific name
- Clypeaster japonicus
- Japanese name
- タコノマクラ
- Group
- Ocean animals
- Class
- Echinoidea
- Order
- Clypeasteroida
- Family
- Clypeasteridae
- Genus
- Clypeaster
It lives in seas from the coast of Aomori Prefecture to Kyushu and the Ogasawara Islands.
It buries itself in fairly coarse sand on the sea floor and eats the bits that settle there, among other things.
How the Japanese Sea Biscuit lives
It uses tube feet to cover its back with sand and gravel, blending into its surroundings. It has tube feet tipped with suckers and can crawl among gravel and rocks.
新潟大学佐渡自然共生科学センター臨海実験所新潟市水族館 マリンピア日本海Basic data
- Diet
- Sediment and other matter
- Range
- From the coast of Aomori Prefecture to Kyushu, and the Ogasawara Islands
Where the Japanese Sea Biscuit 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 — タコノマクラChecked: 2026-11-04
- 新潟大学佐渡自然共生科学センター臨海実験所 — タコノマクラChecked: 2026-11-07
- 新潟市水族館 マリンピア日本海 — タコノマクラChecked: 2026-11-07
- 八丈植物公園・八丈ビジターセンター — タコノマクラ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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