Pembrokeshire County Council workmen have been busy this week clearing millions of dead jellyfish that have been washed up on beaches in the county.
The jellyfish, called Vellela Vellela and more commonly known as By-the-Wind Sailor, are rare in British waters.
The creature gets its nickname from its 'fin' which allows it to catch the wind and sail on the surface of the water, and prevailing westerly winds are thought to have accounted for their presence locally.
The dead and dying jellyfish were discovered after reports to the county council of a blue substance on the beaches at West Dale and Gellyswick. They have since been found on other South Pembrokeshire beaches, including Tenby and Saundersfoot.
The public are being asked not to touch them as they can sting, even when dead.
Pembrokeshire County Council has taken advice from the Environment Agency and the Countryside Council for Wales on ways of disposing of the jellyfish.
Workmen have removed around 100 tonnes of the creatures over the past week in what is believed to be the largest stranding of jellyfish recorded in Great Britain.