The heavy impact of recreational boat tourism, particularly unregulated anchoring on Posidonia oceanica meadows in the Cyclades is a significant concern due to its adverse effects on the meadows condition. Boat anchors and chains directly damage Posidonia meadows by uprooting or crushing the seagrass plants. This physical damage disrupts the structure and integrity of the meadows, reducing their ability to provide habitat and support biodiversity in the marine ecosystem.