The main cytoskeletal structure in adult hydra is an array of aligned fibers that span the entire organism. Tampering with the cytoskeleton is enough to disrupt the formation of new hydras ...

Juliano and colleagues analyzed nearly 25,000 individual cells from adult hydra polyps to find which genes were active inside each cell. “Every 20 days, it’s basically a completely new animal ...

This effect was reversible, in that hydra recovered from blockage when observed 5-7 d from the initial time of inhibition. Similar results were observed during head regeneration 9. In adult polyps ...