A large amount of jellyfish have been spotted near the shores of NH and Maine.

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Rob Royer of the Seacoast Science Center, says the jellyfish are attracted to phytoplankton because that is a staple of their diet, and it's plentiful in these waters at this time of the year.

In an article at seacoastonline.com, Rob Royer says:

 "It’s something that occurs every spring when the water warms up and there’s more plankton,” Royer said. “The jellyfish will go through a bloom and start to multiply. Sometimes people won’t really notice because they’ll be farther out at sea.”

Apparently tide and other conditions may cause the jellyfish to venture closer to shore.

Jellyfish have been known to have a painful sting. If you get stung, the best remedy is to put ice on until any swelling goes down.