Beaches in Guardamar del Segura were temporarily closed earlier this week after officials discovered two poisonous sea slugs, also known as blue dragons, in the water.
The closures were a precaution to protect swimmers and beach-goers from the potentially dangerous creatures.
The town’s police department announced on social media that all municipal beaches would remain closed until further notice.
The blue dragon: Small but dangerous
The blue dragon (Glaucus atlanticus) is a striking little marine creature, measuring just 3 centimetres (1.2 inches). Despite its tiny size, it is highly venomous. The slug feeds on other venomous animals, such as the Portuguese man o’ war, and stores their toxins in its body, making it capable of delivering a painful sting.
Touching a blue dragon can cause severe pain, burning sensations, and other reactions depending on individual sensitivity. Even those washed up on the shore are dangerous to touch.
The Guardamar del Segura police acted quickly, advising the public to avoid swimming and direct contact with the animals. Officials stressed that although the creatures are small, they should not be underestimated.
By the end of the week, the swimming ban was lifted. However, authorities urged beach-goers to remain vigilant, report any sightings, and avoid handling the blue dragons.
Mayor José Luis Sáez recommended rinsing any stings with saltwater and seeking medical attention if the pain is severe.
A rare mediterranean visitor
Blue dragons are typically found in the Atlantic, Pacific, and Indian Oceans. Their appearance in the Mediterranean is unusual and likely caused by ocean currents. Their presence in Spain’s Mediterranean waters is extremely rare, making this sighting in Guardamar del Segura noteworthy.
