Between 1985 and 1994, over four million red-eared sliders—small, colorful turtles popular as pets—were imported into France. These turtles were often sold as affordable and easy-to-care-for companions, but many outgrow their tanks and are later released into the wild. While some owners believe they are giving the turtles a better life, releasing non-native animals is illegal in France and can result in fines between 150€ and 9,000€, along with possible prison time. This practice has had lasting environmental consequences. Red-eared sliders are an invasive species in France, meaning they were introduced from another region and now threaten local ecosystems. They compete with the European pond turtle, the only native freshwater turtle in the country, for resources like basking areas on rocks or logs. This competition has led to higher winter mortality rates among the European pond turtles, which are less adaptable to environmental changes. Red-eared sliders have a significant advantage over their native counterparts due to their adaptability and varied diet. They eat a wide range of foods, including amphibians, insects, bird eggs, young fish, and aquatic plants, while the European pond turtle is primarily carnivorous. This broader diet, along with their ability to survive in different environments, allows red-eared sliders to thrive in French waterways, even after their importation was banned in 2018 under EU regulations. Despite the ban, red-eared sliders continue to live in ponds, rivers, and marshes across France. Some specialized centers, like the North American Turtle Recovery Center in Lyon, care for abandoned turtles, but opinions vary on how to manage the situation. While some wetland managers push for habitat improvements to support the native European pond turtle, others suggest that it may not be necessary to completely eliminate the red-eared slider population. The challenge remains to balance conservation efforts with the reality of established invasive species.