Turns Out Dory Wouldn't Have Made It Through

Billions of tiny jellyfish, called Mauve Stingers, have flooded Ireland's coastal waters and the invasion has drained the life of the salmon farm, killing more then 100,000 fish.
Salmon rescuers tried to reach the cages but the mass of jellyfish 'made it impossible.'
In 30 years in the business, managing director John Russell said he had never seen anything like this. "The sea was red with these jellyfish and there was nothing we could do about, it, absolutely nothing," he said.
Fish altering their location is usually the result when there is a change in their primary oceanic waters' temperature. That seems to be the likely cause of the jellyfish moving to Ireland since this incident has never happened to Ireland before.
As a result, The Department of Agriculture's fisheries is currently running a full investigation. Source.