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The Guardian - UK
The Guardian - UK
Environment
Helen Scales

Discovered in the deep: the sea cucumber that lives a jellyfish life

Pelagothuria, the swimming sea cucumber that looks like a jellyfish
Close to 100 Pelagothuria were spotted in the Pacific Ocean by scientists on the Okeanos Explorer research ship. Photograph: NOAA/OER

Wafting through the deep sea is a diaphanous creature that resembles a jellyfish, but is in fact something else entirely. Pelagothuria natatrix, meaning swimming sea cucumber, belongs to a group of animals better known for lying around on the seabed like giant, rubbery worms.

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