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Ocean animals

Pycnogonum tenue

Amazing fact

Males of Pycnogonum tenue guard the eggs until they hatch.

鳥羽水族館
Pycnogonum tenue in its habitat (illustration)

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An illustration based on the real animal.

A little discovery to share.

Unlike most other sea spiders, its legs are fairly thick and short, and its body is sturdy.

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THE REAL WORLD

The real Pycnogonum tenue

Scientific name
Pycnogonum tenue
Japanese name
ヨロイウミグモ
Group
Ocean animals
Class
Pycnogonida
Order
Pantopoda
Family
Pycnogonidae
Genus
Pycnogonum
Facts about the real animal.
01

A sea spider found south of Sagami Bay and in the East China Sea.

02

Unlike most other sea spiders, its legs are fairly thick and short, and its body is sturdy.

03

It clings to sea anemones and sucks their body fluids.

Where the Pycnogonum tenue has been recorded

World map with dots where the Pycnogonum tenue 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 livesJapanAsiaOcean

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.

This page was translated from the original Japanese with the help of AI.

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