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An illustration based on the real animal.
A little discovery to share.
The smooth box crab has a smooth shell surface.
THE REAL WORLD
The real Smooth Box Crab
- Scientific name
- Calappa calappa
- Japanese name
- マルソデカラッパ
- Group
- Ocean animals
- Class
- Malacostraca
- Order
- Decapoda
- Family
- Calappidae
- Genus
- Calappa
A box crab found from south of Sagami Bay across the western Pacific and the Indian Ocean.
The rear edges of its shell flare out strongly, so it looks as if a round lid has been placed on top of it.
How the Smooth Box Crab lives
It usually buries itself in sand to hide.
沖縄美ら海水族館Basic data
- Range
- South of Sagami Bay, western Pacific, and Indian Ocean
Where the Smooth Box Crab 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
- マルソデカラッパ
- 简体中文
- 馒头蟹
- 繁體中文
- 饅頭蟹
- Español
- Cangrejo caja liso
- Français
- Crabe honteux géant
- Português (Brasil)
- Caranguejo-cofre-gigante
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 — マルソデカラッパChecked: 2026-11-04
- 沖縄美ら海水族館 — マルソデカラッパ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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