Love the mermaid in bath design, but didn't like the girl so much. Really appreciated the shared MeshMixer file to make this change easier. So I return the favor and offer my own meshmixer file a well.
I found another mermaid girl. Took her top half and placed her in the bath.
Had to re-sculpt and pose her hair in Meshmixer. Some of her hair is too small to slice or print, but I wouldn't worry too much about it.
I placed a block behind her back to fill a void so it prints better and easier to clean. The print shown does not have that block.
Made one with shells on her nipples to offer a less NSFW version.