What is the movement structure for a hydra?

Hydra, a small freshwater cnidarian, exhibits movement primarily through a combination of muscle contractions and a simple nerve net. It has an elongated body with a basal disc for attachment, and it moves by contracting its body muscles to shorten and expand, allowing it to glide or somersault. Additionally, hydra can utilize a form of locomotion called "looping," where they anchor one end and contract the other to pull themselves forward. Their movement is generally slow and is often influenced by environmental stimuli.