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The Finished Piece
1. A new tool I made to form the back of the fish, and using it in the hydraulic press.
2. Using that same tool as a stake, using a heavy planishing hammer.
3. Using a smaller ball stake to form the curvature of the sides of the fish.
4. using this special stake to form the tight curvature of the fish's underside.
5. The form is ready to close up.
6. With a thin piece of steel inserted to leave a slot to insert the tail fin, the metal is flattened out smooth.
7. For attaching the fish to the wood, I made this threaded brass piece. It looks funny, but will be completely hidden.
8. The tail fin is made and ready to go into its slot.
9. Final assembly and silver-soldering complete. 
10. View of the underside, showing how it was mounted, using a machine screw. I also used epoxy putty to keep the fish from rotating.
11. Another view of the finished piece.