
The Cornwall Wildlife Trust said there had been 144 sightings in the last three days, beating the previous record of 40 recorded in 2000 and 2009.
They said that the creatures were washing up because of the strong westerly winds pounding the British coastline.
The Marine Conservation Society said there had also been sightings reported on beaches in Pembrokeshire, Isles of Scilly and Ireland.
Perranporth beach in north Cornwall was temporary closed as a precaution due to the numbers found.
The Portuguese man o' war, which is not a jellyfish but a floating colony, has long tentacles that can cause a painful sting and be fatal in extremely rare cases.












Comment: Other fatalities caused by lightning strikes across southern Asia in the past week include a woman in Cambodia, with 4 deaths across Bangladesh while in India 2 were killed Odisha, 2 in Tamil Nadu and a farmer and his cow in Karnataka.