Rise of jellyfish reveals sickness of world's oceans
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The rise of jellyfish populations in many of the world's oceans may be more than just an inconvenience for swimmers who want to take a dip. An expert warns it could be a sign of deteriorating marine health.
http://www.cbc.ca/news/world/story/2013/06/07/tech-jellyfish-bloom-quirks.html?cmp=rss