A single sting can cause severe pain, skin irritation, vomiting, fever, and in some cases, more serious allergic reactions.

Beaches in the Canary Islands were closed this week after a "dangerous" sea creature was spotted in the water. La Cantería ...

The beaches of Guardamar del Segura, in Alicante, were closed this week after two toxic blue dragon sea slugs were found in ...

A seven-mile stretch of Spain's Costa Blanca has been closed to swimmers following the appearance of so-called blue dragons, ...

The stings are incredibly painful, causing nausea, vomiting, and though unlikely, may cause death in people with severe ...