Crucifix crab
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An illustration based on the real animal.
A little discovery to share.
The crucifix crab has flattened, paddle-shaped rear walking legs.
THE REAL WORLD
The real Crucifix crab
- Scientific name
- Charybdis feriata
- Japanese name
- シマイシガニ
- Group
- Ocean animals
- Class
- Malacostraca
- Order
- Decapoda
- Family
- Portunidae
- Genus
- Charybdis
Where the name “Crucifix crab” comes from
Its reddish-brown striped markings also give it the name toragani.
いおワールドかごしま水族館A relative of the ishigani crab that lives in seas from south of Sagami Bay to the Indian Ocean and the western Pacific.
How the Crucifix crab lives
When small, it lives on the bells of large jellyfish. It is often found on sandy or muddy bottoms in shallow seas. It moves swiftly through the water and can catch and eat small fish.
いおワールドかごしま水族館海洋委員會海洋保育署Basic data
- Range
- South of Sagami Bay, the Indian Ocean, and the western Pacific
Where the Crucifix 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
- シマイシガニ
- 简体中文
- 锈斑蟳
- 繁體中文
- 鏽斑蟳
- 한국어
- 십자무늬민꽃게
- Español
- Cangrejo nadador tigre
- Bahasa Indonesia
- Rajungan karang
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 — シマイシガニChecked: 2026-11-04
- いおワールドかごしま水族館 — シマイシガニChecked: 2026-11-07
- 海洋委員會海洋保育署 — 鏽斑蟳-臺灣百種海洋動物圖鑑IIChecked: 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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