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.
Included tongue-less 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.
Cloyster here: https://www.thingiverse.com/thing:2967312