How I made the 3D model of the crab with the lute
In particular, I applied the modifier subdivision surface to a cube, flattened a side with a loop and then made an extrusion from the upper face.
The strings are cubes modelled to an L shape.
I choose a pose such that the lute lies on the bases and is as close as possible to the crab. This way the 3D printed miniature will be more solid.
Here the finished 3D model