How do hydrozoans move?

Hydrozoans primarily move using a combination of pulsing contractions of their bell-shaped medusa stage and by utilizing their tentacles for propulsion. In their polyp form, they can extend and contract their body to glide along surfaces or use a form of locomotion called "somersaulting." Additionally, some hydrozoans can also drift with ocean currents. Overall, their movement is largely passive, relying on water flow for dispersal.