Overview
- Officials reported a visible algal carpet west of Warnemünde over the weekend that mainly affects beach sections 30–36 along the Rostock coast.
- Tests by the Rostock health office have confirmed the presence of toxin‑producing cyanobacteria and local authorities advise against bathing or touching visible algal accumulations.
- The warning singles out children and dogs as especially at risk and tells dog owners to prevent animals from entering or drinking the water.
- Authorities have not issued a blanket bathing ban because wind and coastal currents can quickly move or disperse surface scums, so monitoring and on‑site signage remain in place.
- Beyond immediate toxin risks, experts warn that decaying blooms can fuel Vibrio bacteria growth and that nearby beaches such as Graal‑Müritz and parts of the Polish coast are being watched or subject to separate measures.