Prionechinus forbesianus
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An illustration based on the real animal.
A little discovery to share.
After males were found to ride on top of females, it was given the name kagamimochi-uni.
THE REAL WORLD
The real Prionechinus forbesianus
- Scientific name
- Prionechinus forbesianus
- Japanese name
- カガミモチウニ
- Group
- Ocean animals
- Class
- Echinoidea
- Order
- Camarodonta
- Family
- Trigonocidaridae
- Genus
- Prionechinus
It lives in deep water from the seas near Japan through the Malay Archipelago to Fiji.
After males were found to ride on top of females, it was given the name kagamimochi-uni.
How the Prionechinus forbesianus lives
They have been observed moving around very little. A male on top of a female has been observed shoving against another male. They have also been observed bunching their spines and moving their tube feet vigorously.
鳥羽水族館鳥羽水族館Basic data
- Range
- Waters near Japan through the Malay Archipelago to Fiji
Where the Prionechinus forbesianus 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
- カガミモチウニ
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 — カガミモチウニChecked: 2026-11-04
- 鳥羽水族館 — あけましておめでとうございます。カガミモチウニです。Checked: 2026-11-09
- 鳥羽水族館 — カガミモチウニChecked: 2026-11-09
- 鳥羽水族館 — カガミモチウニの行動観察Checked: 2026-11-09
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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