Welsh beach covered in hundreds of creepy jellyfish that are cousin of deadly Portuguese Man o’ War
Spooky blue Valella jellyfish, a cousin of the deadly Portuguese Man o' War, blown ashore by their 'sails'
AN alien army has invaded a British beach - jellyfish cousins of the deadly Portuguese Man o' War.
Thousands of the weird blue creatures have washed up on beaches across West Wales, brought in by warm waters from the Atlantic.
Gareth Davies spotted hundreds of the Velella jellyfish at Bullslaughter Bay near Castlemartin, Pembrokeshire.
He said: "It was an amazing sight - like something from another world."
Velella jellyfish have a distinctive blue pigmentation and float partly above the water with a "sail"; they use to travel across oceans.
The fist-sized creatures are often mistaken for their deadly cousins the Portuguese Man o' War but beachcombers were advised not to worry too much as they are relatively harmless.
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The Jelly Watch website reckons the Velella are not dangerous to humans, but they can sting and capture small prey.
People are often advised to avoid touching their face or eyes after touching Velellas, as itching may develop on parts of the skin that have been exposed.
The creatures typically live far offshore in open ocean waters, and little sails help distribute them using the force of the wind.
But because they sail only downwind or at a slight angle to the wind, they are often blown ashore in very high numbers.
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