Overview

• Guardamar del Segura initially shut beaches and raised red flags along roughly 11 kilometers after two Glaucus atlanticus were found at Vivers beach.
• Many stretches have been downgraded to yellow flags with bathing allowed under caution as lifeguards and municipal patrols keep up active monitoring.
• Authorities warn the public not to touch the animals and advise rinsing with seawater and seeking medical attention if contact occurs.
• The 3–5 centimeter pelagic nudibranch stores stinging cells from prey such as the Portuguese man o’ war, causing painful welts and occasionally severe allergic reactions.
• Recent Mediterranean appearances, including a July sighting off Mallorca, are described by researchers as sporadic events linked to warming seas and northward shifts of tropical species.