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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31 Aug 2025Scotts Bluff National Monument, Gering, Nebraska, United States
17 Sep 2025A young bull moose, Denali National Park, Alaska, United States
7 May 2025Dunluce Castle, County Antrim, Northern Ireland
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30 Dec 2024Mount Field National Park, Tasmania, Australia
Queen Elizabeth II (1926–2022)
13 May 2024Fish River Canyon, Namibia
8 Jun 2025World Oceans Day
22 Sep 2023Hobbit Day
20 Jan 2026Penguin Awareness Day
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