I added the flower and animated it. I didn't render the rest because the flower is just "breathing" in it.
Now I need to remember what is left to do. From what I remember things left are fluids, additional tentacles on sides, camera movement, and environment remake.
I'm pleased with how this flower model behaves in its first animation. I found a few problems with it, but for this animation, they are not critical. Looking at this animation, I would make a "meat" flower part a bit bigger, so that the bumps in it don't look flat. One big upside is that this flower is quite easy to animate, but I would like to reduce controllers amount because animating each petal can be a tedius job.