How Do I make tentacles with animations like floating in water

I am trying to make a Tentacle Demon Avatar but I am confused on how to make the tentacles flexi, and if there is some way i can set the flexible path so it makes the tentacle to appear to have individual movement from the other parts. I am going to be linking several tentacles together but not sure if there is an animation that i should put into each piece like a flicker (like hair in water, or tentacles in water) n where to get it.

Not sure if this is the right place to post, i will in other subjects, all help greatly appriciated.

Edit the object you wish to make flexible, click the "Features" tab and checkmark the Flexible Path checkbox, then, play around with the various settings, (tension, wind, gravity, etc) until the prim reacts like you want.