Originally Posted by kedawa
Some observers blame heavy rains in China over the summer, which flowed out from rivers and propelled abnormal numbers of jellyfish towards Japan. Nutrients in its river water may have given them extra zip ã or overfishing has allowed the growth of the populations of plankton on which the jellyfish feed.
That would be my guess too.
The Japanese are responsible for a large portion of the illegal overfishing in the north atlantic, and I can only guess at what they get away with in their own waters.