Beachgoers in Spain recently faced unexpected closures thanks to a tiny yet dangerous invader, the blue dragon. These striking marine slugs can deliver powerful stings, forcing authorities to shut beaches to protect tourists. Found in tropical waters, their growing presence in European seas highlights climate-driven changes in ocean ecosystems. Scientists are closely monitoring their arrival, studying their venom and habits. From fascinating biology to painful defense mechanisms, this gallery explores the blue dragon’s world in detail.
Click on to discover the secrets of this tiny menace.