Fig. 5. Color-coded images of the arm stripes of the squid (A) and the cuttlefish (B) showing the e-vector angles of the arm stripes. The key for color coding of the e-vector angles is shown at the bottom right of the figure. As in Fig. 2C,D, the brightness of each coded color is proportional to the relative reflectance value at that point in the full-color image, and the arm stripes were tilted or rotated at different angles as indicated at the left side of each row. The original pictures were taken from the z-axis with illumination from right side of the image (Position 1; see Fig. 1).