Jean-René Auffray passed away ten years ago after drowning in a bed of green algae in the village of Hillion, located in the Côtes-d'Armor department in northern France. His death, though tragic, has sparked a lasting conversation about the dangers of green algae, which can form dense mats in waterways and pose a risk to swimmers. The incident has remained a poignant reminder of the unpredictable hazards of natural environments. At a recent meeting of the regional council, close family members of Jean-René Auffray shared their thoughts and emotions, emphasizing the need for action rather than lengthy discussions. Their presence and words carried significant weight, highlighting the personal impact of such events on families and communities. Green algae, also known as Cladophora, is a common type of aquatic plant that can grow rapidly in freshwater environments. While it is a natural part of many ecosystems, its dense growth can create hazardous conditions, particularly in areas where people swim or recreate. The algae can entangle swimmers, making it difficult to move or breathe, which can lead to serious injury or death. The family’s message is clear: they urge authorities and local officials to take practical measures to address the risks associated with green algae in local waterways. Their call to action reflects a broader concern for public safety and the need for effective environmental management. The memory of Jean-René Auffray continues to serve as a powerful reminder of the importance of vigilance and responsibility in protecting both people and natural spaces.