The tentacles are flat for printability and have hooks to hang on to the jellyfish body.
The big tentacles hang diagonally around the center axis due to gravity tilting it. The exact angle are not tested in real life.

I have not yet successfully printed it since I have clogged my nozzle. But I guess it will be very nice in something translucent or transperant such as woodfill, taulman tglaze or colorfabb xt, or just translucent pla/abs

They might come out as 1/10th scale. if so scale up. (tentacles and zero thickness)
For best result with transperant materials try to print with only one thick shell.

The zero thickness is a easyprint version that only can attach small tentacles and should be printed as an open vase, with no infill and top solid layers.

Hope it works, still work in progress..