In China, a graduate student unwilling to part with a dead moon jellyfish, his companion for more than a year, collected fragments of its corpse and placed them in a new tank. More than two months later, he found a polyp with three tentacle nubs sprouting from the jellyfish corpse. More and more polyps unfurled in the following days, and the graduate student dutifully collected them and placed them in a new tank, where they settled in and fruited and bloomed into medusas. Moon jellyfish are also often invaders, blown by currents and rippling into vast blooms in the Atlantic and the Pacific.
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