Hundreds of fascinating alien-like creatures have washed up on various beaches in Wales, leaving locals puzzled. The striking blue sea creatures, reminiscent of crystal formations, are believed to be Velella Velella, commonly known as by-the-wind sailors. Similar to the Portuguese Man o’ War, these animals are typically found in the Atlantic, Indian, and Pacific oceans.

Witnesses reported seeing numerous colonies of these creatures along the coastlines of Anglesey and the west Gwynedd area, with one individual in Barmouth noting hundreds scattered along the town’s beach. Referred to as a “blue tide,” beachgoers were taken aback by the unexpected arrival, likening the creatures to alien jellyfish and describing them as one of the most peculiar sights on the shore.

Despite their surprising appearance, these creatures are said to be relatively common, usually appearing in the autumn and winter seasons. Marine specialist Frankie Hobro cautioned that while their sting is mild compared to the Portuguese man o’ war, it can still cause discomfort if touched, particularly on sensitive areas like the face or lips. She emphasized the importance of avoiding direct contact and recommended protective clothing when in the sea.

The electric blue by-the-wind-sailors are colonial hydroids, composed of tiny individual animals forming a colony, rather than being true jellyfish. Measuring around 7cm in length, these creatures feature a small sail that catches the wind, allowing them to drift wherever the breeze carries them.

Frankie noted that the appearance of these creatures in June is unusual, possibly influenced by recent weather patterns. She expressed concern about the increasing overlap between the arrival of Portuguese Man o’ War and by-the-wind-sailors, indicating the impact of climate change on ocean currents.