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Jellyfishes colours are dued to own pigments or microorganisms pigments living in symbiosis with them; pigments, usually, give red, pink or violet colourations.

* Microorganism like zoochlorellae are greenish. * Zooxanthellae are brownish. * Some blue colourations can be dued to the presence of Cyanobacteria. Some jellyfish, like Pelagia noctiluca or some Trachymedusae, are bioluminescent and can emitt greenish or multicoloured flashes.

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17y ago

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