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“Stuff like this happens more often than you'd think; about two or three times a year, jellyfish blooms cause serious problems for power, desalination and other plants, according to Lucas Brotz of the University of British Columbia's Institute for the Oceans and Fisheries. "In some cases, it's caused nuclear power plants to have near meltdowns," Brotz told The Post.”
IEC workers stand next to containers filled with jellyfish at Orot Rabin coal-fired power station near Hadera, Israel on July 5, 2011. (Ronen Zvulun/Reuters)
A worker from the Israel Electric Corp. drops a jellyfish into a container at Orot Rabin coal-fired power station in Hadera on July 5, 2011. (Ronen Zvulun/Reuters)
Excerpts taken from The Washington Post
“How jellyfish have become nature’s ultimate guerrilla protesters against power plants”
By Elahe Izadi July 7, 2015
Photo: Ronen Zvulun/Reuters
Jellyfish invade power plant in Israel
"Blooms of the [Jellyfish] clog power plants worldwide, threatening to shutter all operations. Just last week, a coal-fired power plant in Rutenberg, Isael worked hard to unclog its filters from a nearby swarm that could have shut down its cooling system . . . "

"While IEC stayed open despite the swarm -- workers managed to get them unclogged in time -- other power plants haven't been so fortunate. In 2013, a giant swam of moon jellyfish shuttered the world's largest boiling-water reactor, located in Sweden. The same thing happened at the plants in 2005."