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...coast of Israel, where tropical species have moved in through the Suez Canal, jellyfish floated in swarms more than 100 km long and 2 km wide. Blooms of Mnemiopsis, first documented off Israel last winter, clogged the filters of a desalination plant that supplies coastal communities with 100 million liters of water a day. At the height of the outbreak, water production at the plant dropped by more than a third as desperate workers tried to clear the filters. (See video: "Battle of the Endangered Species: Bats v. Trees...
...oxygen-depleted waters of the Gulf of Mexico that shrimpers have been forced to hang up their nets during the swarm season in the summer. In the nutrient-rich waters off the coast of Japan, where jellyfish can grow to the size of refrigerators, a nuclear power plant was forced to lower production in 2006 when a mass of the creatures clogged its cooling system...
...debate hasn't reached the same level of specificity in the U.S. The Food and Drug Administration has given food companies the freedom to tout the health benefits of omega-3s without differentiating between the plant-derived and fish-derived kinds. Instead of worrying about food labels, scientists there are questioning whether the omega-3 benefits of fish consumption outweigh the risks of getting too much mercury. The FDA has taken a tough stance, advising women who are pregnant, nursing mothers and young children to avoid eating fish that is high in mercury, such as swordfish, king mackerel and tilefish...
...Some experts are wary of the proposal, though. A group of 20 scientists from seven countries who specialize in fatty acids have warned it could allow food manufacturers to deceive consumers. They say that without clear labels, companies can use plant-derived omega-3s in their products and pass them off as the superior, fish-derived omega-3s. "They would be able to pour in cheap plant oils, but imply that they deliver the same health benefits as fish oils," says John Stein, a neurophysiology professor at Oxford University and one of the scientists urging the European Parliament to vote...
...Unilever, which sells margarine containing omega-3s, insists that its labels are accurate. The Anglo-Dutch company makes two different types of margarine, both of which it says are healthy. It produces margarine with omega-3 plant oils for vegetarians and margarine with omega-3 fish oils for people who eat fish, clearly stating on the labels which type of fatty acids are in each spread. "It's not a competition between these different omega-3s - all are essential for the diet, " says Anne Heughan, Unilever's director of external affairs for Europe. Moreover, she says, Unilever is within...