Spain Closes Beach After 'Most Beautiful Killers in the Ocean' Invade — Stings Can Trigger Severe Nausea, Vomitting

Glaucus atlanticus (Credit: Flickr/michaelhooper)

Tourists on Spain's popular Costa Blanca coastline have been banned from entering the sea after sightings of a rare and venomous marine creature known as the Blue Dragon, described by scientists as 'the most beautiful killer in the ocean.'

Authorities in Guardamar del Segura, a municipality located just north of Torrevieja, have closed a seven-mile stretch of beach following sightings of the Glaucus atlanticus, or the Blue Dragon.