ncaquariums.com/askaquarium/... http://www.wwaytv3.com/node/9472 The "invasions" appear to be logged mostly in July and August. And are attributed to unusually high water temperatures, among other things. I have witnessed large jellyfish invasions in Virgina (near Portsmouth) and in Florida, as well. But I do not think that any of these were considered a normal or seasonal occurance.
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