HomeScienceNew blue jellyfish species, nicknamed as "samurai jellyfish" found in Japanese waters

New blue jellyfish species, nicknamed as "samurai jellyfish" found in Japanese waters

A Japanese scientist discovered a striking cobalt-blue samurai jellyfish, a new venomous species, revealing marine shifts and climate-driven oceanic changes.

November 25, 2025 / 13:10 IST
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Bright Blue Samurai Jellyfish Found in Japanese Waters (Image: Karen H Black)
Bright Blue Samurai Jellyfish Found in Japanese Waters (Image: Karen H Black)

A striking new jellyfish species has been discovered off Japan’s coast. Its vivid blue colour and crescent-shaped float immediately caught scientist's attention. Researchers say it represents a previously unknown venomous marine organism in the region.

What Was Discovered?

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Japanese researchers identified a new jellyfish species named Physalia mikazuki. It is nicknamed the “samurai jellyfish” for its crescent-shaped float. The species is bright cobalt-blue, unlike its tropical relatives. It is venomous and capable of delivering painful stings to humans.

Why named as “Samurai”?