Find reference photos of fish to use for this project. Look online or in books for photos of fish to use. Having reference photos will help ensure that each person creates a unique fish relief and will prevent all of the projects from looking the same.
Draw a fish on paper. Use the reference photograph to accurately portray gills, fins and scales. Attach the drawing to embossing foil with a piece of tape. Using a pen, draw over the lines to transfer the drawing to the foil. Carefully remove the paper from the piece of foil.
Create the relief by using a popsicle stick to trace along the lines in the foil. Try alternating between tracing on the front and back of the foil; each side will give the relief a different look.
Paint the aluminum foil with acrylic paints, if desired. Use blue, green, teal and brown paint to add color to the entire scene. Clean your brushes in water between using different colors.