Beware: Jellyfish Bloom Hits Greek Beaches – A Serious Problem

Once again, jellyfish are swarming in the waters of Greece, with a significant presence reported in many areas. According to the Hellenic Biodiversity Observatory, there is a bloom of Pelagia noctiluca jellyfish, with reports indicating a problem in beaches and seas around Northern Evia, the Northern Sporades Islands, as well as Skiathos and Skopelos. The Hellenic Biodiversity Observatory warns those swimming in these areas to be extra cautious. Unfortunately, initial estimates about the intensity of the jellyfish bloom in the Pagasetic Gulf and surrounding areas were underestimated due to low public participation in data collection, which skewed the real situation. The bloom is spreading faster than expected. Reliable reports have emerged from Chalkida and Northern Evia, where the further north we look, the more intense the problem becomes. Northern Evia is already facing a serious issue, acting as an outlet for the Pagasetic Gulf towards open waters. The Pagasetic Gulf continues to see jellyfish presence, particularly along its eastern shores. The bloom has even reached the Northern Sporades, with confirmed sightings in Skiathos and Skopelos. If you’re swimming or visiting beaches in these areas, please be extremely careful. The Pelagia noctiluca is an impressive but dangerous species due to its powerful sting. It’s recommended that sightings be reported on iNaturalist for scientific verification and public awareness. Similar blooms have been observed across the Mediterranean between 2020–2023, with Gibraltar currently experiencing the worst conditions. Spain, France, Italy, and the Adriatic Sea have also reported blooms. The Pelagia noctiluca, known for its vivid pinkish-purple hue, is common in Greek waters during summer months. Its sting causes intense pain, redness, and irritation, and can lead to nausea or dizziness in sensitive individuals. In rare cases, it can be life-threatening if the person is allergic or extensively stung. If stung, exit the water safely, avoid rubbing the affected area, and rinse it with seawater. Seek medical help immediately in case of severe allergic reactions.