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Thousands of jellyfish wash up on Welsh beach

Aliens have landed? Photo: Carmarthenshire County Council

As the warm weather sends us flocking to the beach in our droves, it seems we are not alone! Thousands of Barrel Jellyfish have been found washed up on Cefn Sidan beach in West Wales over the weekend.

Also known as Credit: Carmarthenshire County Council

The barrel jellyfish is the largest to swim in our waters, with a diameter of up to 90cm and weights of up to 35 kilos. They are also known as frilly-mouthed or dustbin lid jellyfish... 3 guesses why! In summer and autumn as the sea temperature warms up, they may swarm off the coast, and it is common for them to wash up in large numbers.

Washed up in their thousands Credit: Carmarthenshire County Council

They might look pretty gruesome, but barrel jellyfish feed entirely on tiny plankton rather than humans! Recent mild winters mean that plankton numbers have risen, which means the jellyfish are thriving too! And whilst their sting is too weak to hurt humans, you are advised not to touch them!

Not harmful to humans Credit: Carmarthenshire County Council