As a member of the Phylum, Cnidaria, hydra arose early during metazoan evolution before divergence of the protosome and deuterostome branches. Its body plan is organized as a gastric tube with a mouth ...

Biologists sized up an unlikely natural phenomenon: when parasitism actually causes the number of hosts to increase, an effect known as a hydra effect. A study of common water fleas and their fungal ...

New research highlights the development of HySyn, a system designed to synthetically reconnect neural circuits using neuropeptides from Hydra, a small, freshwater organism, into the model organism C.

In Greek mythology, Hydra was a monstrous water serpent that lived in a swamp and terrorized nearby residents. When intrepid Hercules sliced off one of Hydra’s multiple heads, two more heads grew back ...