News arrived on Wednesday about the only salmon farm in Northern Ireland being wiped out by a very unusual and massive infestation of jellyfish, known as Mauve Stingers, last week. The (original) BBC article will follow with details. What is interesting is that of the online papers running this story in the UK at the moment (morning of 22nd November, not a single one has mentioned even in passing the environmental questions that really should be asked and indeed have a precedent to be asked. I will expand on this after you read one of the articles:

“A jellyfish invasion has wiped out Northern Ireland’s only salmon farm, killing more than 100,000 fish.
A Northern Salmon spokesman said last week’s attack could cost more than £1m.
Billions of small jellyfish, known as Mauve Stingers, flooded into the cages about a mile into the Irish Sea, off Glenarm Bay and Cushendun.
The jellyfish covered an area of up to 10 square miles and a depth of 35 feet. Rescuers tried to reach the cages but the density of fish made it impossible.
Managing director John Russell said he had never seen anything like this in 30 years in the business.
It could take at least two years for the firm to recover
“The sea was red with these jellyfish and there was nothing we could do about, it, absolutely nothing,” he said.
“It’s a disaster for this company - you cannot legislate for something like this.”
He says the firm could take at least two years to recover.
The company has some high-profile clients, with Irish chef Richard Corrigan serving Glenarm salmon to the Queen on her 80th birthday last year as part of the BBC’s Great British Menu programme.
The Department of Agriculture’s fisheries division has carried out a full investigation, and talks with NI Agriculture Minister Michelle Gildernew have taken place to try and rescue the farm and save the jobs of 12 staff. “
What the Independent had to say was even briefer and much the same.
The Belfast Telegraph, the newspaper with Northern Ireland’s largest circulation only had the following to say:
From www.belfasttelegraph.co.uk:
“Thursday, November 22, 2007
A jellyfish invasion has completely wiped out Northern Ireland’s only salmon farm, killing more than 100,000 fish.
Billions of jellyfish known as mauve stingers flooded into the salmon cages around a mile off the Antrim coast last week.
They covered an area of up to 10 square miles and 35 feet deep.
Rescuers tried to reach the cages, but the density of the invasion made that impossible.
A spokesman for Northern Salmon Co said he had never seen anything like it and the attack could cost the company around £1m.”
SkyNews thought to add the following piece of information:
From news.sky.com:
“The fish is sold to some of London’s leading restaurants and the Queen had salmon on her 80th birthday cooked by top Irish chef Richard Corrigan.”
None of the UK papers asked why this may have happened or talked about environmental questions which may point to the answer to why it has happened. It took a Canadian newspaper to write this:
From www.theglobeandmail.com:
“The species of jellyfish responsible, Pelagia nocticula — popularly known as the mauve stinger — is noted for its purplish night-time glow and its propensity for terrorizing bathers in the warmer Mediterranean Sea. Until the past decade, the mauve stinger has rarely been spotted so far north in British or Irish waters, and scientists cite this as evidence of global warming.”
Now, this newspaper mentions that scientists cite this as evidence of global warming, so it is time to find out what the scientific thoughts actually are. Interestingly the Independent actually has in the past talked about the link between the marked increase in jellyfish swarming and global warming, in an article written 27th July 2007 titled, “Europe’s coastal resorts battle a Jellyfish invasion”, of which an excerpt follows (emphasis mine):
From news.independent.co.uk:
” Some scientists and ecological campaigners explain the new prevalence by pointing to a rise in average sea temperature, linked to the warming of the planet. Lack of rain has meant a shortage of cold fresh water entering the sea from rivers, with the end result of a warmer, saltier sea that puts off larger creatures but is well-suited to jellyfish. Human sewage, together with fertilisers from intensive farming along the Mediterranean coast, produces a rich soup of nitrogen and phosphates that jellyfish also like.
Others blame the fact that natural jellyfish predators – such as the bluefin tuna and the turtle – have been driven almost to extinction, a consequence of overfishing and pollution. Still others think that the jellyfish explosion might be connected to the overfishing of other species, such as the anchovy and the sardine, which used to compete for the minute creatures and plankton on which jellyfish voraciously feed.
There also seems to be a connection with a change in the wind and the pattern of the Mediterranean currents, which may themselves be linked to global warming. Jellyfish live deep in the sea during the day but rise to the surface at night to feed. For all their undulating mobility, jellyfish have little control over where they travel, and are mostly swept along by currents and prevailing winds that propel the creatures landwards.
It all signals a deep malaise in the Mediterranean. “Every jellyfish that comes ashore brings us the message that the sea is sick,” says Josep Maria Gigli, scientific coordinator of the Spanish environment ministry’s Medusa Plan.
Apart from the mauve stinger, various other species also thrive in the Mediterranean. One regular visitor is Cortylorhiza tuberculata, known as ” fried egg”, which luxuriates in the warm, salty lagoons near the fashionable Murcian resort of La Manga, lagoons rich in nutrients from the fertilisers drained from the region’s intensive plastic-greenhouse agriculture. The fried egg’s sting is mild, but its sheer numbers transform the water into a milky gloop. Rhizostoma pulpo, or octopus jellyfish, named for its eight long tentacles, is also on the increase.
The deadly Portuguese Man o’ War (Physalia physalis) is increasingly being swept towards Europe’s Atlantic coasts, in “blooms” resembling a sinister sea of plastic bags. But so far, currents have yet to drag this majestic but deadly creature through the Gibraltar Strait into the Mediterranean.
“Jellyfish are a natural part of the marine environment, but the scale of what’s happening now is a warning that something’s going very wrong,” says Dr David Santilo, a marine biologist for the Greenpeace research laboratories at Exeter University.
The French-Canadian biologist Daniel Pauly paints an apocalyptic vision of oceans taken over by jellyfish: “We are moving from a marine ecosystem dominated by big fish to a soup of small organisms. If we carry on like this the only things in the sea will be jellyfish and plankton soup.”
A return to primeval slime? “A lot of pressures are pushing in that direction,” says Dr Santilo. “The mechanisms are there to make that happen. Ecosystems are flexible up to a point, but no one knows when elasticity breaks into a different sort of ecosystem and you get an irreversible shift. This plague of jellyfish is a like hazard warning light. It’s a wake-up call.”
Ecologists do not criticise the Spanish government’s effort to protect holidaymakers from unwelcome tentacular visitors. But they say it is not enough. “It’s like using a fly swat to combat malaria,” says Ricardo Aguilar, a spokesman for the international environmental organisation Oceana. “The sickness remains.”
Gabriel Gorsky is a marine biologist at the Observatoire Océanographique in the town of Villefranche-sur-Mer, between Nice and Monaco. He believes the problem is that jellyfish have never been studied in great scientific depth. They have lived on the planet for 650 million years but have never attracted much attention from mankind.
“It is only now that they are causing a problem that we have started taking an interest in them,” he says. “But even now, the money available for research is limited. The truth is that we really don’t know why they have started to appear in much greater numbers. It could be global warming. It could be a lack of predators and competitors. It could be a change in winds and currents. It could be a combination of all those things. But we really don’t know yet.”
The truth is that there have always been jellyfish in the Mediterranean. Traditionally, they have appeared along the Côte d’Azur every 10 or 12 years and remained for about four years. Then they have retreated to the depths again.
In the last decade, however, the pattern seems to have changed. In the period from 1996 to 1998 there was a much larger infestation than any seen before. The shoals of jellyfish then disappeared, but returned once more, earlier than expected, and in still greater numbers, in about 2003. “
In another article, again by the Independent in August 2006, titled, “Invasion of the jellyfish”, it is written:
From environment.independent.co.uk:
“It appeared one day in huge numbers. No one quite knew why…Tens of thousands of people were attacked as they were paddling on a seaside holiday…Some died…There was something apocalyptic about it. For it seemed that the creatures had been summoned, unwittingly, by human beings who knew not what they were doing.
It sounds like the plot of a disaster movie. But there is currently an explosion of jellyfish worldwide. Holiday destinations in Spain, Italy, France, Croatia and northern Africa are plagued with a creature called Pelagia noctiluca, which glows a dull yellow and packs a painful sting, hence its common name, the mauve stinger. It is burgeoning throughout the Mediterranean and the Adriatic.
…there are fears that we may be seeing something irreversible, thanks to global warming. Normally the bulk of jellyfish medusas remained 40 miles off the coast where sea temperatures are higher than by the beach. But drought has depleted rivers and greatly reduced the volume of cooler river-water flowing into the sea. That means coastal waters are now considerably warmer and less salty than in the past.
Marine biologists say the temperature of the northern Mediterranean has increased by 4C this summer. It means that plankton, the main food of the jellyfish, is blooming. And at the same time the creatures’ natural predators such as swordfish, tuna and turtles are in decline. A delicate eco-system is out of kilter.
One thing is clear, fishermen around the world now haul in 450,000 tons of jellyfish a year, more than twice as much as a decade ago. That fact could have significance beyond demonstrating the foodie need for constant novelty. Breeding jellyfish may be taking over the ocean, and not just because they can thrive in less oxygen-rich water than fish. Research published last month at the University of St Andrews looked at the area off the coast of Namibia which was, thanks to the Benguela current, once one of the most prolific fishing areas in the world but which was plundered by foreign fishing fleets until the 1990s. What they found was that jellyfish have overtaken fish in terms of the biomass they contribute to the ocean.
Over-fishing has transformed what was once one of the world’s most prolific ecosystems, apparently triggering a jellyfish explosion in what researchers fear may be a permanent “regime shift” in which they outnumber real fish by a ratio of four to one. Once jellyfish become established, says the lead researcher at St Andrews, Andrew Brierley, “it may be very difficult to revert to fish domination because jellyfish are predatory on fish eggs and juveniles”.
Jeremy Jackson, a marine ecologist at the Scripps Institution of Oceanography, in the United States, said: “We’re pushing the oceans back to the dawn of evolution, a half-billion years ago when the oceans were ruled by jellyfish and bacteria.”
Perhaps that doom-laden disaster movie is not so far-fetched after all.”
A brief search for articles noting an increase in water temperatures around the world reveals plenty of reports citing evidence from scientific research unequivocally showing water temperature rises and the impacts of such. A couple of examples:
“Rising temperatures throw nature a curve“, by Beth Daley, Boston Globe Staff, November 13, 2007

“Narragansett Bay’s natural timing is out of sync.The bay’s average annual water temperature has increased about 2 degrees Fahrenheit since 1960, and in winters it has warmed about 3 degrees. There is growing evidence that the temperature changes are breaking down carefully evolved relationships among species and disrupting the vast food web the bay depends upon.”
The multitude of changes taking place in Narragansett Bay illustrates a critical lesson as the world warms: Large ecological change may come from the smallest break in the food chain.
The bay’s winter warming roughly parallels a 4.4-degree rise in New England’s average winter air temperature since 1970, a trend scientists ascribe, at least in part, to the release of heat-trapping carbon dioxide from power plants, vehicles, and factories. Scientists deduce that the warming of Narragansett Bay is tied to this trend because they know that estuaries and bays are heavily influenced by air temperatures. Other partially enclosed coastal waters, such as Woods Hole and Long Island Sound, have also warmed during the same period, giving researchers confidence the warming in Narragansett Bay is not an anomaly.
The bay is also one of the places where researchers would expect to see the effects of warming first, because it is on the dividing line between southern and northern waters.
“Warmth, wind speeds lower Lake Superior” by Tina Lam and Eric Sharp, November 3rd, 2007, Free Press Staff Writers
From www.freep.com:
“Sharply higher water temperatures and an increase of up to 30% in wind speeds over Lake Superior appear to be co-conspirators in the relatively rapid decline in water levels on the world’s largest freshwater lake, a scientist told a Great Lakes conference Friday.
Water temperatures on Lake Superior, now at near-record low [water] levels, have risen twice as fast as air temperatures in the last 25 years, said Jay Austin, a researcher at the University of Minnesota-Duluth.
The change in lake temperatures tracks the rise in air temperatures that hundreds of scientists around the world have documented in the second half of the 20th Century, accelerating since 1970.
Looking at shoreline temperature data over about 100 years and data from buoys in the middle of Lake Superior since 1980, Austin said sharp increases in air and water temperature began about 25 years ago.
Austin said he believes ice cover on the upper Great Lakes has dropped by half in recent decades.
He said he doesn’t know if his observations are early signs of global warming that will continue.”
“Warmer oceans storing climate change dangers” by David Adam, environment correspondent,The Guardian, November 29 2006:
From www.guardian.co.uk:
“Global warming is creating a climate time bomb by storing enormous amounts of heat in the waters of the north Atlantic, UK scientists have discovered.Marine researchers at Southampton and Plymouth universities have found that the upper 1,500 metres of the ocean from western Europe to the eastern US have warmed by 0.015C in seven years. The capacity of the oceans to store heat means that a water temperature rise of that size is enough to warm the atmosphere above by almost 9C.”
Even as we look back a few years to 2002, we can find reports of the link between the great increase of jellyfish in unusual circumstances and the rise in the water temperature, thus prompting questions and bringing up the question of global warming.