UK seaside towns have been put on alert after hundreds of strange creatures arrived on the beachfront. Experts say the appearance is highly unlikely given the season and that it could see the dangerous Portuguese Man O'War slip onto UK beaches.
By-the-wind-sailors Spotted on North Wales Coasts
Velella velella, also known as By-the-wind-sailors, are closely related to the Portuguese Man O' War. The species was spotted across the North Wales beaches right across Anglesey and down the West Gwynedd coast. Typically around 7cm long, these creatures have a small, stiff sail that catches the wind. The tiny colonies of animals go wherever the wind takes them – it is pure chance where they end up. But hundreds were spotted on the North Wales coast earlier this week, as reported by North Wales Live.
Expert Comments on Unusual Appearance
Marine specialist Frankie Hobro, owner of Anglesey Sea Zoo in Bynsiencyn, said: "They blow in on winter storms and are therefore noticed less often. June is late in the season to see them. We had a warm spell in late May followed by an unsettled start to June, which may be why they’re appearing now." She added: "What is slightly worrying is that Portuguese Man O’War are arriving earlier in the year and more frequently, overlapping with marine creatures like By-the-wind-sailors. It shows how climate change is affecting ocean currents."
Sting Risks and Precautions
Those who find themselves stung by the By-the-wind-sailors may find it to be mildly irritating, unlike the horror pain of a Portuguese Man O'War sting. By-the-wind-sailors' stings are very mild. Hobro said: "I would always recommend covering up when in the sea. By-the-wind-sailors are not dangerous but their stings can irritate and you wouldn’t want to touch your face or eyes if you’ve been in contact with one." She also warned that even when washed ashore and appearing dead, their stinging cells can remain active and still cause discomfort, urging people to admire them from a distance.
Future Threats
Hobro noted: "We’ll soon be seeing reports of more dangerous creatures like Weever fish and Portuguese Man O’War. It can be difficult to avoid contacts but a rash vest will help and swim socks or booties are a good idea." The appearance of these creatures serves as a reminder of the changing marine environment due to climate change.



