Rigging

Once I've done the UVs I started rigging. Firstly I wanted to use dynamics to animate all of the tentacles. But then I've decided this wouldn't be that flexible to animate as it prevents posing the jellyfish. So I've created controls to each tentacle. The rig is made of spline IKs. I've attached clusters to the spline curves and constrained the controls to the clusters. To clean up the view for the animator I've hidden the joints and deformers. I've also put some colours to the controls so their not that confusing. This might be the longer approach but in the end it will allow much more interesting animation. Here is a screenshot of the finished rig:

And here is the jellyfish with only controls visible: