ANOTHER Spanish beach has been forced to shut after it was invaded by a swarm of killer "blue dragons"

The toxic sea slug was spotted in Lanzarote just days after tourists were banned from entering Spain 's la Costa Blanca because of the venomous creature.

Lifeguards evacuated La Cantería beach in Órzolon and warned holidaymakers to stay clear of the waters until further notice.

Known as Glaucus atlanticus, the dangerous seabeast has been dubbed "the most beautiful killer in the ocean" because of its glistening blue skin and powerful, deadly sting.

Human contact with the creature can prove lethal with symptoms ranging from severe pain, skin irritation, vomiting and fever.

I t has a sting as powerful as the much larger Portuguese man o’ war – and preys on the

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