Swarm of jellyfish take out entire fish farm.

November 28, 2007 at 7:56 pm (environment, frightening things) (, )


Billions of jellyfish in a dense school covering 10 square miles wiped out the entire population of more than 100,000 fish at Northern Ireland’s only salmon farm, the business owners said Wednesday.

Ten square miles!? Just try and visualize that for a second…

Managing Director John Russell said the Northern Salmon Co.’s dozen workers tried to rescue the salmon, worth about $2 million, but their three boats struggled for hours to push through the 35-foot-deep mass of jellyfish. All the salmon were dead or dying from stings and stress by the time the boats reached the two net pens last week, about a mile off the coast of the Glens of Antrim, he said.

… The species of jellyfish responsible, Pelagia nocticula — popularly known as the mauve stinger — is noted for its purplish nighttime glow and its propensity for terrorizing bathers in the warmer Mediterranean Sea. Until the last decade, the mauve stinger had rarely been spotted so far north in British or Irish waters, and scientists cite its presence as evidence of global warming.

See Grist for a more detailed explanation of the factors that most likely played a role in this aqua-drama.


1 Comment

  1. Trout Stage Daring Breakout at Fish Farm : Environmental News said,

    […] to the water, the trout had to leap into the tiny metal pipe then swim against the swift current. Fish farm owner David Riley said: “I have been a farmer here for about 30 years and have never seen a […]

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