While swarm of jellies may look serene, you're best off keeping your distance. A sting from the most dangerous jellyfish on Earth can be deadly. Even when we're not looking at the most dangerous, many ...
Mauve Stinger jellyfish at Cork's Lough Hyne on Friday. Picture: Dr Tom Doyle The big question now is whether the mauve stingers will survive in the lough over the winter. “We don’t know the ...