Like other jellyfish, it goes through two main stages of life, polyp and medusa. During the medusa phase, it produces eggs or sperm, which combine to create larvae that form new polyps.

Craspedacusta sowerbii aren't frequently seen in their adult, "medusa" form. The invasive species likely came from Asia in ...

The hydroid is the polyp form of the jellyfish. It attaches to substrate in its habitat, and no medusa form of C. caspia has been seen in North America, from what I can tell.

Those free-swimming jellyfish in the sea don't start out in that familiar medusa form, but rather start as sessile and asexual polyps. Now, researchers reporting in the Cell Press journal Current ...

Smagula said the jellyfish start out in polyp form on the murky bottom of lakes and ponds. It's only when the polyps develop a "medusa," the outer orb of translucent membrane, that the jellyfish ...

Those free-swimming jellyfish in the sea don't start out in that familiar medusa form, but rather start as sessile and asexual polyps. Now, researchers reporting in the Cell Press journal Current ...

The polyps make more polyps. And more … Until they form a whole neighborhood of clones … So how do they go from tiny polyp stuck on a rock to giant medusa gliding through the open ocean? When the ...

Those belong to a different taxonomic group, Scyphozoa, and tend to spend most of their lives as jellyfish; hydrozoans have briefer medusa phases. An adult medusa produces eggs or sperm, which combine ...

The polyps bloom into their medusa form, the typical free-swimming jellyfish shape, when surface waters reach about 80F. This typically only occurs between July and September.

And others are interested in how the polyp is nearly indestructible—you can basically blend it and the cells will find their way back together—while the medusa is so delicate.