A genus of tiny, freshwater animals belonging to the phylum Cnidaria and class Hydrozoa is called Hydra.
They are indigenous to both tropical and temperate climates.
Because of its capacity for regeneration and apparent lack of aging or old age death, the hydra has attracted the attention of biologists in particular.
Hydra is a sessile and cylindrical polyp form.
In essence, a hydra polyp is a two-layered tube with a ring of tentacles encircling the mouth opening at the hypostome's tip.
Asexual budding takes place on the body column's bottom half.