Hydra

A freshwater polyp that can regenerate its entire body from a small fragment/Microscopic Life

Hydra is a genus of tiny freshwater cnidarians, relatives of jellyfish and corals, typically 1 to 20 mm long. They are famous for their extraordinary regenerative abilities: a hydra can regrow its entire body from as little as 1/200th of the original organism. Scientists believe hydras are biologically immortal because their stem cells have unlimited self-renewal capability, showing no increase in mortality rate with age. They capture prey using stinging cells (cnidocytes) on their tentacles that fire microscopic harpoons called nematocysts at speeds of up to 2 m/s, making it one of the fastest cellular processes in nature.