Nobody has been able to determine what type of animal appeared on the tide.
The discovery has left locals in the small village shocked.(Image: Clayton Boswell)
The enormous corpse of a sea creature has left locals stunned after it washed up on a beach in Wales.
One visitor was shocked after seeing what she believed to be a whale carcass on the sand at Cefn Sidan Beach in the village of Pembrey, Carmarthenshire.
It was spotted on the tide, and quickly attracted attention from residents and visitors to the popular spot.
Marine experts are to examine the creature to try and determine how it died, Wales Online reports.
In similar cases on Welsh beaches, stranded whales have been found to be malnourished or affected by pollutants such as discarded plastic.
Cefn Sidan is one of the longest beaches in Wales, and is popular with walkers, families and tourists.
The appearance of the carcass has caused shock among locals, but could provide experts with important information about the health of marine life in the region.
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It comes just weeks after three rare whales were found washed up dead on the shore in Orkney, in a separate incident.
The northern bottlenose whales – a deep-diving ocean species rarely seen close to land – were discovered at the southern tip of Papa Westray on July 23.
Early examinations suggested the animals were in good health before they became stranded, with no signs of entanglement, fishing gear injuries, or other human-related trauma.
Director of the Scottish Marine Animal Stranding Scheme (SMASS) Dr Andrew Brownlow said at the time the deaths were “tragic” and pointed to broader environmental concerns.