I recently started with Spine 2d and the first jellyfish didn´t look good, so I tried it again with the cherry one. I did 2 versions, in the first one only the ribbons have physics constraint and the second one where the ribbons and also the frill parts have physics constraints. (Sidenote: physics constraints can´t be exported with a perfect loop at the moment : https://de.esotericsoftware.com/forum/d/25225-about-4209-export ) I still have much to learn and I´m thinking about switching from CSP back to PS even if I would prefer not to.