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Mystery surrounds the remains of what looks like some sort of sea monster that has washed up on a beach.

Beach-goers have been left baffled after the 11ft long carcass was discovered on Port Talbot's Morfa Beach.

It was first discovered by a couple out walking their dog, but no-one has so far identified what it is.

Melanie Rees, 41, said she and husband, Mike, 47, are used to seeing jellyfish and other small creatures washed up on the sand - but never anything this big.

The mother of two originally thought the huge remains was a piece of driftwood but realised it must have been an animal because she could see 'thousands of flies'.

She has speculated that the mystery creature could have been a whale, and even joked that someone suggested it might have been the remains of a dinosaur.

More: This is what the sea creature washed up on a Welsh beach could have looked like before

Mrs Rees, from Port Talbot, said: "I couldn't believe how big it was. At first I thought it was a piece of driftwood or a big log as it was so far off the beach.

"But when we got closer, I could see thousands of flies and I knew it had been an animal.

"I think it could be a whale, but I'm not sure. I don't think a whale would wash up that far."

She said despite uploading photos of the beast onto social media, no one has been able to help identify her find.

Mrs Rees added: "People on Facebook have been hilarious. One has even said it could be a dinosaur, but I'm not so sure."

What do you think it is? Let us know by tweeting @WalesOnline.