Portuguese men o' war "jellyfish" found washed up on UK beach
Several dangerous Portuguese man o' war "jellyfish" have been found washed up on a beach in Cornwall, UK.
The creatures were seen on a beach near Perranporth on Tuesday (September 12).
Their venomous tentacles can deliver a painful sting, which can be fatal.
These floating hydrozoans use an air sack as a sail to drift around the sea.
Despite their appearance and reputation for stinging, technically they are not jellyfish but siphonophores.