To make a stuffed fish for your doll you need to print pictures (Google search) of fish onto fabric with your ink jet printer. Do that by ironing an 8 1/2" x 11" piece of plane fabric to the same size piece of Freezer Paper. This will allow the fabric to go through the printer.
Make sure to make two copies of each fish and flip one of the pictures so it prints both directions.
Remove the freezer paper from the fabric. Paint your fabric fish with vinegar so that the colors won't get damaged with water in the future.
Cut out each of your fish with as much space as possible for sewing. Put the two fish mirrored image to each other. Hold it up to light to make sure they are lined up.
Draw a seam allowance around the fish. Find a spot with a long straight edge to leave un-stitched for turning you fish after sewn.
Before sewing the fish, you need to add a looper so that the fishing pole can "catch" the fish. I attached a loop of fishing string out of the fish mouth. You can also use string or thread.
Once the fish is sewn, turn it right side out. Stuff. Whip stitch closed.
Here is a great tutorial to finish stitch your project.
Enjoy fishing with your Doll.