People have been left perturbed by the sight of a strange pale, foamy substance on Welsh beaches, but experts have explained it's a perfectly normal phenomenon as the weather gets warmer. Natural Resources Wales said its officers have received a few reports from concerned members of the public about "sewage or slurry" on beaches or in the water in parts of South and South West Wales.
But the body has confirmed that it has investigated the substance, which was found to be caused by tiny, naturally occurring seasonal algae. It said the algae thrives in warm weather conditions, and is often mistaken for sewage or other pollution because of its oily appearance and its slight seaweed-like smell.
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