Giant jellyfish invade Japan

So what happens when they mix in with radioactive water used to cool down the reactors.... radioactive jellyfish? Hmmm....
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Millions of 6ft, 440lb jellyfish are congregating off the western coast of Japan, their numbers apparently boosted by rising sea temperatures and a decline in natural predators.

Giant jellyfish invade Japan
Nomura's jellyfish are one of the largest species of the creature in the
world. Their scale was demonstrated in the autumn of 2009, when a 10-ton
fishing boat was sunk as the crew tried to haul in a net containing dozens
of the creatures.

Increasing numbers of the jellyfish have been recorded in the Sea of Japan
since 2002, with experts suggesting the population explosion in recent years
is due to the 1.89 degree Fahrenheit increase in temperature in waters off
China making conditions more favourable for breeding.

In the early 1900s, according to Professor Shinichi Uye, a leading expert on
the species at the Graduate School of Biosphere Science of Hiroshima
University, large numbers were only reported every 40 years or so.

Another contributing factor, experts believe, is a decline in the number of
predators, which include sea turtles and certain species of fish.

was invaded on a similar scale in the summer of 2005, when the jellyfish
damaged nets, rendered fish inedible with their toxic stings and even caused
injuries to fishermen. In 2007, there were 15,500 reports of damage to
fishing equipment caused by the creatures.
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