Lion's mane jellyfish
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Scientists conduct biggest survey of jellyfish for 40 years

22 July 2014 Last updated at 09:52 BST

More and more jellyfish are being spotted on the UK's coastline during the summer months, and scientists are trying to find out why.

In the biggest survey of its kind in 40 years, they have looked at reports of more than 5000 sightings in the UK and analysed the results.

John Maguire reports.