In Fish Magic, Paul Klee creates a magical realm where the aquatic, the celestial, and the earthly intermingle. A delicate black surface covers an underlayer of colors, which the artist revealed by scratching and scrawling designs in the black paint. At the center of the painting, a square of muslin is glued onto the canvas. A long diagonal line reaching to the top of the clock tower is poised as if to whisk off this subtle curtain.