Step 16: Use the shape on the right side as a guide to draw Dory’s tail. Darken the sides of the tail and make the right edge wavier.
Step 17: Draw a few lines inside Dory’s tail and fin for the ridges inside. On the lower left side of the body, draw a small curved arc for the fin on the other side.
Step 18: Add Dory’s pattern by drawing some lines inside the shape of the body. Draw a curved line at the top. Near the center of the body, draw a long curved line similar to a backward letter S. Use the construction lines as guides for placement.
Step 19: Add the rest of the pattern by drawing a small circle-like shape on the right side of Dory’s body. Draw a long arc inside the shape of the tail.
Step 20: That’s it! You now have a nice sketch of Dory from Disney•Pixar's Finding Nemo. You can stop at this quick drawing for a rough, sketchy look or go for a more finished look by continuing to the next step.