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Ocean animals

Pomatocheles jeffreysii

Amazing fact

The Tsunogai hermit crab has asymmetrical claws shaped like lids.

국립생물자원관
Pomatocheles jeffreysii in its habitat (illustration)

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An illustration based on the real animal.

A little discovery to share.

The Tsunogai hermit crab has asymmetrical claws shaped like lids.

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THE REAL WORLD

The real Pomatocheles jeffreysii

Scientific name
Pomatocheles jeffreysii
Japanese name
ツノガイヤドカリ
Group
Ocean animals
Class
Malacostraca
Order
Decapoda
Family
Pylochelidae
Genus
Pomatocheles
Facts about the real animal.
01

A hermit crab living on muddy bottoms in deep water from Sagami Bay to Kyushu.

02

It makes its home in the long, slender shells of tusk shells (tsunogai).

Basic data

Range
Sagami Bay to Kyushu
鳥羽水族館

Where the Pomatocheles jeffreysii has been recorded

World map with dots where the Pomatocheles jeffreysii has been recorded
Each dot marks a place with observations or specimens shared on GBIF. Some records are of animals that strayed or were brought by people, so the dots are not always where the animal lives.

Records: GBIF.org (CC0 and CC BY 4.0 records, retrieved 2026-11-07). Map: Natural EarthSee the records on GBIF

Where it livesJapanDeep sea

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

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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