Big Seashell Survey 2026

Join the 9th edition of the Big Seashell Survey and discover the wonderful world of shells along the high tide line! This citizen science initiative teaches us a lot about the distribution of these marine animals, the impact of climate change, and the presence of exotic species. Together with hundreds of nature enthusiasts, you help researchers gain a better understanding of our North Sea. 

In 2026, the focus is on how shell counting affects you.
Shell counting has long provided valuable insights into changes in marine life. This year, we look beyond the numbers and explore how the counting experience makes you feel - more curious, calm, or simply more connected to the beach. Your experience matters as much as the shells you count.

More info (Dutch only) https://www.groteschelpenteldag.be/nl