Warning to British tourists in Spain over 1 fatal thing in sea

Spanish beaches have been forced to close because of the issue. (Image: Getty)

British tourists in Spain have been warned of a potentially fatal sea creature that has forced multiple beaches to close this summer. The so-called blue dragons (Glaucus atlanticus) feed on other poisonous animals, such as jellyfish, and store their venom in concentrated doses. Coming across one can be deadly as they can trigger a severe allergic reaction from a single sting, causing severe pain, skin irritation, vomiting, and fever.

Until 2021, they hadn't been spotted off the coast of Spain for over 300 years, opting instead for the warmer waters of the Atlantic, Pacific, and Indian Oceans. However, authorities in Lanzarote were forced to close a beach mere after the deadly sea creatures were spotted in the waters. Lifeguards evacuated La Cantería beach in Órzola, after sightings of blue dragons. 

The blue dragon feeds on venomous jellyfish. (Image: Getty)

They were also recently spotted in El Médano and Leocadio Machado beaches in Tenerife, prompting warnings from local authorities.

Last Wednesday, swimming was banned along a seven-mile stretch of coast around Guardamar del Segura area just north of Torrevieja on the Costa Blanca.

Jose Luis Saez, the mayor of Guardamar del Segura, said in a post on X: "Bathing is prohibited following the appearance on Vivers Beach of two specimens of Glaucus atlanticus, known as the Blue Dragon".

Sea slugs normally live on the sea floor, but blue dragons swallow a little air bubble, which allows them to float on the ocean surface.

Measuring typically "3cm or just over one inch in length," according to One Earth, the "ornate" creatures are found on the surface of the Atlantic, Pacific and Indian Oceans.

Anyone who is stung by a blue dragon should first of all rinse the affected area with seawater, before removing any tentacle fragments with a stick or gloves.

A cold pack should be applied to reduce swelling. In the event of breathing difficulties, dizziness, or a severe allergic reaction, medical attention should be sought.