Tourist beaches closed thanks to blue dragon sea slug

WorldEnvironment
22 Aug 2025 • 11:48 PM MYT
The Independent
The Independent

The world’s most free-thinking newspaper

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  • Beaches in Guardamar del Segura, Alicante, were temporarily closed to swimmers after two toxic blue dragon sea slugs were discovered.
  • The creatures, around four centimetres long and bright blue, are known for their painful sting which can cause nausea, pain, and vomiting in humans.
  • Local authorities prohibited swimming and warned people not to touch the slugs, even with gloves, advising them to report any sightings.
  • Guardamar del Segura's mayor, José Luis Sáez, confirmed the red flag status on social media, indicating a ban on swimming.
  • The beaches were later reopened with a yellow flag, allowing swimming, but municipal and emergency services continue to monitor the situation.

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