A family enjoying a stroll along a Welsh beach were left astounded when they spotted “something moving in the sand”. It was a large spike seemingly trying to burrow itself out of sight.

Angharad Owen and her family made the find during their visit to Traeth Benllech on Anglesey’s western coast. The sandy beach, perfect for paddling and exploring rock pools, was where Angharad and her family encountered an unusual visitor halfway up the beach and quite a distance from the sea.

“My mum spotted it when she saw something moving in the sand,” she said. "As it was small I was told it must be a female. We noticed it was trying to burrow into the sand. As I have a sea creature-mad son we showed it him and he was amazed.