OK, messed that up, let's try again:
Wrap the hook with thread.

Cut the foam to fit.

Here is the tool I use to turn down the bodies.

I use an emery board and dremel to turn the bodies down to the shape I want.

Cut a slit in the foam, and use super glue to glue the body on.

Paint scales, attach eyes, thread the legs, and coat with Liquid Fusion, and tie whatever tail you like on the back.