Billion-strong Jellyfish Swarm Irish Coast

According to 4NI, a mass invasion of Mauve stingers were discovered near Portrush, Co Antrim and as far south as Co Sligo.

The billion-strong swarm could potentially stretch for hundreds of miles around the Irish coast, an expert said on Monday night.

4NI says that last year a 10km square infestation wiped out over 100,000 salmon in a fish farm off the coast of the Glens of Antrim, 50 miles north of Belfast.

Billions of the jellyfish flooded into the cages about a mile into the Irish Sea last year, and there were so many of the jellyfish that they covered an area of 10 Km square and were so numerous as to be down to a depth of 12m.