World Jellyfish Day Nov. 3, 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

An experiment in sustainability
Nov. 3, 2023World Jellyfish Day
Nov. 3, 2024International Day for Biosphere Reserves

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Nov. 16, 2025A traboule in Lyon, France
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A 50-year balancing act
Oct. 10, 2024Ancient town of Sorano, Tuscany, Italy
Rainbow around the sun
Where the rainbow ends
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Apr. 19, 2025Zion National Park, Utah, United States
Apr. 29, 2024Fujian Tulou, China
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