Overview

• Guardamar del Segura initially closed an 11‑kilometre stretch after two Glaucus atlanticus were found near Playa Vivers, then downgraded to yellow flags on August 26.
• Sightings have been logged on the Costa Blanca and in Valencia, Cádiz and the Canary Islands, with Mallorca recording its first official specimen in centuries.
• Officials advise no contact and recommend rinsing stings with seawater without rubbing, with medical care for severe or allergic reactions.
• Marine biologist Juan Lucas Cervera says injuries are generally rare and mild and questions broad closures when only a few specimens are present.
• Researchers link the episodic strandings to winds and currents and note warmer waters could influence encounters, though a climate change link remains unproven.