A woman from Cork has captured footage of a Lion's Mane jellyfish while on a staycation in Mayo.
Maeve Conway (23) was kayaking with her sister in Mularanny on Wednesday morning when they spotted it.
Speaking exclusively to Newstalk, she said she thought it was just giant seaweed at first.
"It was my younger that spotted it when we were kayaking at sunrise," she said.
The two sisters were at an inlet, quite close to the shore.
She said there "loads of other" jellyfish in the area.
"We saw this at the surface and thought it was a piece of seaweed."
"I was videoing lots of different ones and only saw what it was afterwards, which is good because I had my hands very close to it".
"It was only yesterday as well I heard that all the beaches are full of them".
Maeve says they would often go kayaking, but this was special as they are on holiday.
"We're from Cork but we're down here on a staycation - my parents are form Castlebar".
The Lion’s Mane is the most serious jellyfish in Irish waters, according to the HSE.
It prefers the cooler waters of the Irish Sea and especially the waters off Dublin.
But recently an increase has been seen in waters off the east coast - with large jellyfish on beaches in the area.
All jellyfish have stinging cells, or 'stingers', on their tentacles.
But the Lion's Mane stinging cells are much sharper, and can pierce the skin easily.
A sting from a Lion's Mane can cause nausea, sweating, cramps, headaches and other symptoms.
