The island of Anglesey, off the northwest coast of Wales, is often visited by ghostly figures.
Most of the time, they are submerged in the Irish Sea, only to appear from time to time, spooking locals in the Holyhead community.
While it isn't uncommon for them to make the occasional appearance, their recent visit was timed close to Halloween. When Craig Fairclough, a regular visitor to the area, snapped a photo and posted it to Facebook, the image quickly went viral.
What you're seeing isn't actually a group of ghosts but rather, seaweed-covered wooden stakes from an old lifeboat ramp that arise when the water is at low tide.
A photo of the 'ghosts' recently snapped by Craig Fairclough. (Facebook/C. Fairclough/Storyful)
Years of debris pile-up have given them a human-like form.
Lifeboat crews have operated in Holyhead since 1828, North Wales Live reports, and at least seven lifeboat crew members have lost their lives trying to reach vessels struggling at sea.
Anglesey's rocky coastline and rough currents pose a risk for ships navigating the area, which is part of a shipping lane connecting Liverpool and Dublin.
The lifeboat ramp now resides beside the Holyhead Maritime Museum, standing as a "testimony to the bravery of lifeboat crews who have operated out of Holyhead since 1828," North Wales Live says.