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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6 Oct 2023Taughannock Falls State Park, New York
16 Nov 2024Wadden Sea coast, Friesland, Netherlands
Twinkle twinkle, little bugs
11 Nov 2024Banff National Park, Alberta, Canada
A different kind of toucan
27 Aug 2025World Lake Day
Beauty beyond imagination
21 Nov 2025World Hello Day
3 Mar 2024World Wildlife Day
Back to the future
28 Aug 2024Paralympic Games begin in Paris
Pearl among the emeralds
1 Nov 2023Haut-Barr Castle
Celebrating our looming lunar neighbour
29 Oct 2025Ancient til trees in Fanal Forest, Madeira, Portugal
Postcard from Italy
When landscape met wilderness
9 Jul 2024Talampaya National Park, Argentina
30 Jun 2025Asteroid Day
30 Dec 2023Daiichi Tadami River Bridge, Fukushima, Japan
25 Aug 2025Yellowstone National Park, Wyoming, United States
Aug 21, 2023Discovery Day in Yukon, Canada
31 Aug 2024Rocks and sand in the Sahara, Algeria
11 Aug 2024Wooden path to Kennedy Lake, Vancouver Island, Canada
1 Oct 2025Welcome to Black History Month
4 Jun 2024Chestnut-headed bee-eater, Bardia National Park, Nepal
Paranormal activity?
9 Dec 2023Vermilion Cliffs National Monument, Arizona, USA
Lighting the world
3 Oct 2025Glen Brittle, Isle of Skye, Scotland