Jellyfish
For the ship with the same please see Jellyfish (ship).
A jellyfish was an aquatic animal originating from Earth.

In 2370, the lionfish Livingston de-evolved into a jellyfish as a result of suffering from Barclay's Protomorphosis Syndrome, although it later recovered. ()

Lieutenant Sylvia Tilly called the Tuscadian pyrosome a "jellyfish from hell". ()

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de:Qualle
Earth animals