Whether hydra ages or not has been a topic of discussion for many decades [0002]. In a four-year study, animals did not show an increase in mortality with age. Although it is possible that these animals live much longer, considering that they reach maturity in 5 to 10 days, a lifespan of at least 4 years is impressive. read more
Hydra / ˈ h aɪ d r ə / is a genus of small, simple, fresh-water animals that possess radial symmetry. Hydra are predatory animals belonging to the phylum Cnidaria and the class Hydrozoa. [2] [3] They can be found in most unpolluted fresh-water ponds, lakes, and streams in the temperate and tropical regions and can be found by gently sweeping a collecting net through weedy areas. read more
Hydra / ˈ h aɪ d r ə / is a genus of small, fresh-water organisms of the phylum Cnidaria and class Hydrozoa. They are native to the temperate and tropical regions. Biologists are especially interested in Hydra because of their regenerative ability — they do not appear to die of old age, or indeed to age at all. read more