World Jellyfish Day 3 Nov 2025

World Jellyfish Day

They don"t have brains, bones or even hearts, yet jellyfish have pulsed through Earth"s oceans for half a billion years. Today, on World Jellyfish Day, these wobbly wonders get their moment in the sun—or at least under the sea. The day promotes efforts to protect jellyfish habitats from threats like pollution, nutrient-rich runoff and ocean acidification.

© Christian Vizl/TANDEM Stills + Motion

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Today in History

Living in harmony
3 Nov 2023World Jellyfish Day
3 Nov 2024International Day for Biosphere Reserves

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11 Sep 2024Rapa Nui National Park, Easter Island, Chile
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14 May 2024Carlsbad Caverns National Park
22 Sep 2023Hobbit Day
5 Feb 2026Salt evaporation ponds on the island of Gozo, Malta
14 May 2026Pitigliano, Tuscany, Italy
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A magical resting place
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Green shoots
24 Jan 2026Big Garden Birdwatch
The road less taken?
A wave of remembrance
5 Aug 2024Hertfordshire, England
25 Feb 2026Mendenhall Glacier, Alaska, United States
9 Mar 2025The Shard, London