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 ...

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

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.

Hence, we usually know about jellyfish introduction when we see the floating medusa form produced by polyps appear in the water, which appear only when water temperature is higher than 21degrees ...

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 ...

References [1] Trophic Positions of Polyp and Medusa Stages of the Freshwater Jellyfish Craspedacusta sowerbii Based on Stable Isotope Analysis. Biology (2023).

The new study, published in April 16, 2019 in Nature Ecology & Evolution, reports the genomes of two jellyfish species and investigated why some creatures can enter the medusa stage while others ...

What’s a ‘medusa’? Jellyfish actually have two forms. One is the floating, pulsating creature that everyone knows, called a medusa. The other is a tiny polyp that lives attached to the ground. Medusae ...

During the medusa phase, it produces eggs or sperm, which combine to create larvae that form new polyps. In most jellyfish species, the medusa dies after it spawns — but not the Turritopsis.