Portuguese Man o' Wars on the Atlantic Coast: Warning for Beachgoers in Southwestern France

Arcachon - 05.08.2026: Portuguese man o' wars have reappeared on beaches in southwestern France. According to reports by Franceinfo, the colonial marine animals were observed from the Arcachon Basin to the Basque coast. Due to the danger posed by their long tentacles, some beaches had to be temporarily closed to beachgoers. The animals are often mistaken for jellyfish because of their bluish floating bodies.Portuguese man o' wars are not individual jellyfish, but colonies of specialized organisms. They drift on the water's surface with a gas-filled floating body that usually shimmers ...