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Ocean animals

Upside-down jellyfish

Amazing fact

The upside-down jellyfish also grows using energy made by photosynthesis in the algae inside its body.

新潟市水族館 マリンピア日本海
Upside-down jellyfish in its habitat (illustration)

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An illustration based on the real animal.

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The upside-down jellyfish also grows using energy made by photosynthesis in the algae inside its body.

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THE REAL WORLD

The real Upside-down jellyfish

Scientific name
Cassiopea ornata
Japanese name
サカサクラゲ
Group
Ocean animals
Class
Scyphozoa
Order
Rhizostomeae
Family
Cassiopeidae
Genus
Cassiopea
Facts about the real animal.
01

It lives in seas south of Kagoshima.

02

Instead of swimming about, it always lies upside down, its body pulsing.

03

It keeps algae that live together with it, called symbiotic algae, inside its body.

How the Upside-down jellyfish lives

It lives in shallow areas of warm seas. It catches food using structures called nematocysts.

新潟市水族館 マリンピア日本海

Basic data

Range
South of Kagoshima
鳥羽水族館

Where the Upside-down jellyfish has been recorded

World map with dots where the Upside-down jellyfish 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 livesJapanOcean

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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