In addition to the unpleasant variety that turns up in the resorts of Corfu, [Latin name "Donutus Manus"] mentioned by Eggy, there is a jellyfish that inhabits the sea around Corfu.
Corfian fishermen know it as “Pelagia noctiluca”.
In Greek Pelagia means “of the sea”, nocti stands for night and luca means light thus Pelagia noctiluca can be described as a marine organism with the ability to glow in the dark.
This species of jellyfish commonly known as mauve stinger, amongst many other common names.
I have an image of and have attempted to post it with this reply.
It may, or may not sting you. But the severity varies.
Treatment of Stings
The only published proven effective first aid treatment for the skin pain of jellyfish wounds is the use of cold packs or ice. Cold is applied to the stung area for 5-15 minutes then re-applied, if necessary. It will stop the skin pain in 98% of cases.
Vinegar is only useful, but very effective, for preventing further discharge and removing adherent tentacles after cubozoan stings.
Barry has mentioned another method that has proven effective.
