This is a model taken from the game My Pokemon Ranch and converted to STL. Had to make quite a few edits to make this work. All the models in the game just have this bobble head style.
Added bare shell pieces, one no pearl, and two of the halves. You can use them for detailing you fish tank or diorama, or use them for a mermaid costume.
Shellder here: https://www.thingiverse.com/thing:2980845
I printed in half vertically from head to tail. Supports needed to the big spikes and some of the shell edges.