World Jellyfish Day Nov. 3, 2025

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. 3, 2025World Jellyfish Day
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Jul. 19, 2024A young jaguar on a riverbank, Pantanal, Brazil
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May 3, 2024The Sonoran Desert, Arizona, USA
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A smooth landing, feet first
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Centuries of time in a Delicate Arch
Jan. 25, 2025Porto, Portugal
Sep. 16, 2025Nighttime view over the Gulf Coast
Sep. 4, 2023Camels in the desert, United Arab Emirates
Jul. 17, 2025Lavender fields in Plateau de Valensole, France