Men-of-war discovered on Cornish beaches
7 September 2012 Last updated at 18:18 BST
Beach-goers in Cornwall are being warned about an unusual visitor to the county which can deliver a powerful sting.
Portuguese men-of-war, which are normally a resident of warmer waters, are being washed up along the coastline.
A boy, Dawud Lee, needed hospital treatment after being stung.
He said it felt like "a little knife going into my foot".