Hydra -- mysteriously immortal. ... A prerequisite for such vegetative-only reproduction is that each polyp contains stem cells capable of continuous proliferation.

Hydra polyps, which have a simple body plan consisting of a foot, body column, ... a form of asexual reproduction where a hydra grows a polyp that is basically a copy of itself.

Thanks to new research, scientists are closer to understanding how “immortal” aquatic animals called hydra regrow their lost heads. Hydra are inch-long freshwater creatures that resemble a ...

We can only dream of being forever young. But for hydra, tiny freshwater creatures, this is a reality. They don't age and can technically live forever — unless they starve or are killed.