Researchers are puzzling: Rare animals are reappearing on the North Sea coast after 100 years. People should report seahorse finds in the Beach Explorer app or on www.beachplorer.org.
Dead animals can also be handed in at national park houses in Lower Saxony. In Schleswig-Holstein, seahorses that have been washed up should be left around. A further 23 animals will be found in 2023 and nine this year. Seahorses are acutely threatened by the destruction of their preferred habitats and by fishing - several million are caught as bycatch every year.