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GeoffNI
Beach-goers are risking potentially deadly "harpoon" stings after Portuguese Man o' Wars started washing up on British shores.

Reports of the jellyfish-like floating colonies have been recorded along the coasts of Dorset, Cornwall and Devon.

The long tentacles of a Man o' War can produce an extremely painful and possibly dangerous sting.

And Peter Richardson, of the Marine Conservation Society (MCS), has told Sky News Online there could be even more of the siphonophores in British waters throughout the summer.

The normally tropical creatures have an 'inflatable sail' that lets the wind blow them across the water. Mr Richardson said strong gusts have probably pushed them north to the UK.

Their stinging tentacles can grow up to 50 metres long.

Mr Richardson, the MCS' biodiversity programme manger, said washed up Man o' Wars will die and eventually break down - but they can still sting if the tentacles are wet.

In rare cases, Man o' War stings have killed people "but it's not like the Box Jellyfish where there's a good chance you're going to die," Mr Richardson added.

Nevertheless, he warned people to seek medical assistance if they are worried about a sting.

The RSOE Emergency and Disaster Information Service said UK sightings included a live six-inch Man o' War at Kimmeridge Bay and others in Burton Bradstock and Durdle Door, Dorset.

A seven-year-old boy was treated after getting stung on the leg while paddling at nearby Charmouth, according to the Daily Mirror.

The creatures - that are not classed as jellyfish - are usually found in places like the Florida Keys and Atlantic coast, the Gulf Stream, the Gulf of Mexico, the Indian Ocean and the Caribbean.
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