Numbers of jellyfish in Irish waters are on the rise.
It is partly down to the warmer waters we are now experiencing.
Some of them are quite nasty, killing salmon in farms and causing extensive damage.
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The biggest ones measures as much as 5' 1" feet in diameter, a lion's mane jellyfish.
Karin Dubsky of Trinity College Dublin spoke to Newstalk's Pat Kenny Show about the work she is doing in the area:
