Jellyfish blooms caused by global warming?

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There is a Nat Geo feature today on jellyfish bloom.  Experiment showed that increased water termperature caused its population to shoot up.  The show featured increase in population of jellyfish in Shanghai  and in Japan.  In Japan, it has disrupted the fishing activities of Japanese fishermen.

Questions:

Heat wave causes jellyfish bloom

From epoch times - increase in jellyfish population a natural occurence?

Fourth int'l symposiium on jellyfish bloom at Hiroshima in June 2013

Is this a trivial topic?

Will it affect our lives?  Our food supply?