Mysterious sea creatures wash up on Cornish beach

Hundreds of baseball-like sea creatures have washed ashore on a beach in Cornwall.

The footage, captured on August 12 in Penzance, shows the sea creatures – known as urchins or sea potatoes – floating on the sea surface and washed up among seaweed.

Urchins live buried in up to 15cm of sand or muddy sediment around UK coasts.