Hyastenus diacanthus
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An illustration based on the real animal.
A little discovery to share.
The Tsuno crab becomes active when it gets dark.
THE REAL WORLD
The real Hyastenus diacanthus
- Scientific name
- Hyastenus diacanthus
- Japanese name
- ツノガニ
- Group
- Ocean animals
- Class
- Malacostraca
- Order
- Decapoda
- Family
- Epialtidae
- Genus
- Hyastenus
It lives from the Boso Peninsula to Kyushu and in the Indian Ocean and western Pacific.
It is found on the branches of sea fans and similar animals, and it moves little during the day.
How the Hyastenus diacanthus lives
It lives on sandy or muddy bottoms and rocky reefs.
新潟市水族館 マリンピア日本海Basic data
- Range
- The Boso Peninsula to Kyushu, and the Indian and western Pacific Oceans
Where the Hyastenus diacanthus 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 — ツノガニChecked: 2026-11-04
- 新潟市水族館 マリンピア日本海 — ツノガニ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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