She added that there were likely to be more families walking along beaches over half term, and combing them for treasures brought in by storms and high tides. “They can look like marine litter – they are nasty little things in disguise.” “Dogs snuffling around on the beach can bite them or pick one up. She told North Wales Live: “When they are small, they are one of those things you can easily pick up without thinking about it. Hilary Rowlands, a founder member of Tywyn Beach Guardians, refuses to walk her dogs on local shorelines after storms for fear of encountering the Portuguese Man O’War. Portuguese Man O' War have also been found on beaches in North Wales following storms (Image: Getty Images) They drag long, ribbon-like tentacles that are are virtually invisible and are designed to kill fish. They can travel by wind for thousands of miles thanks to an enlarged float filled with carbon monoxide and air, which serves as a sail. The Portuguese Man O' War is a floating colony of zooids, genetically identical units with specialised functions.

“They can really cause our doggie friends some serious problems if ingested or stung by them.” “So be aware as they will be on other local beaches as well. “The bad weather has bought these beasties in - they have been seen on Tywyn beach. In a Facebook post, with a photo, the practice said: “Please be careful when walking your dogs at the moment. Pictures posted on Facebook show the creature on Tywyn beach, looking similar to a small, inflated plastic bag, while others have been reported on beaches near Harlech. People are being urged not to touch them or walk barefoot, and to keep dogs and children well away. It can often be mistaken for a jellyfish. One sting from the sea creature can kill both animals and humans in some cases - even if it is already dead. Read more: Thousands of starfish wash up on Welsh beach after Storm Eunice North Wales Live reported that they are causing particular concern because examples found are small – just two inches across – and can easily be mistaken for ocean plastic. The small but deadly marine beasts have washed up on beaches in north Wales following storms Eunice and Franklin. Dog walkers and parents are being urged to look out for Portuguese Man O' War - nicknamed the 'Floating Terror' - which have been spotted beaches.

War of beach