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A pink sludge is taking over Norway’s coast

Earlier this month, researchers started noticing that a mysterious purple goo was taking over Norway's coast.

Mihai AndreibyMihai Andrei
November 30, 2015
in Biology, News
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Earlier this month, researchers started noticing that a mysterious purple goo was taking over Norway’s coast. They’re still looking at the exact cause, but they have a pretty idea about what’s behind it – and it’s as gross as it looks.

Image via Roger B. Larsen

The likely culprit is the cigar comb jellyfish, also known as the cucumber jelly (Beroe spp.), which has appeared in large numbers in both Norway’s Lyngen and Kvænangen fjords. Adults of various species in the genus range from a few millimeters to 1.5 m, but this particular species is on the smaller side of the spectrum. Their bodies consist of a mass of jelly, with one layer of cells on the outside and another lining the internal cavity.

University of Norway associate professor Roger B. Larsen and his team have been surveying the area, and while he didn’t get to test the samples yet, he stated that they are indeed probably responsible for this pink invasion.

“I have some samples of the red-pink slime, and it will hopefully be analysed at the end of the month,” he told Earth Touch News via email

Until now, millions of cubic meters have already been filled, which is a big problem for local fishermen, who routinely use sonar to catch their prey. Because the slime forms a thick layer, it confuses the instruments, making it impossible to detect fish banks. According to Larsen, underwater surveys in the area have also detected large blooms of siphonophores – gelatinous, colonial organisms that often resemble jellyfish.

“These [animals] hold some gas-filled bladders and they might be the reason for the extremely strong sonar echoes close to the seabed.” (Perhaps the most infamous of the siphonophores is the Portuguese man-o-war or “blue bottle”.)

Furthermore, these creatures seem to be taking out local fish; a recent trawl has gathered almost no fish or shrimp, despite the abundant history of the area.

“I’ve done annual cruises with my students here in the past, and have never seen anything like this,” adds Larsen. “It is obvious that there is something going on which [the] wildlife [is] unable to cope with.”

Image via Roger B. Larsen

To make things even more complicated, scientists have discovered a second, unknown mass of marble-like jellyfish, which may be a new species.

“The species is new to me,” he says. “They’re round, have no visible tentacles and a four-part yellow core.”

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Mihai Andrei

Mihai Andrei

Dr. Andrei Mihai is a geophysicist and founder of ZME Science. He has a Ph.D. in geophysics and archaeology and has completed courses from prestigious universities (with programs ranging from climate and astronomy to chemistry and geology). He is passionate about making research more accessible to everyone and communicating news and features to a broad audience.

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