BATHERS and watersports enthusiasts are being warned to be careful in the water after several confirmed sightings of the dangerous Portuguese Men-O-War along the Irish coast including one specimen near Schull as well as Inchydoney, Tramore and Ardmore.
The creatures which are siphonophores, have stinging tentacles that can reach 50m long causing severe pain to humans, leaving red welts on the skin.
A sting may also lead to an allergic reaction and cause fever, shock, and interference with heart and lung function.
In extreme cases stings an even cause death, although this is extremely rare.
In the event of a sting you should seek medical help immediately.