Step 16: Draw Nemo's last fin under the body on the on the left side using the remaining arc as a guide. Add two more arcs under the body on the right side for the final pair of fins.
Step 17: Use the series of lines on the left side as guides to draw Nemo's tail. Follow the basic path of the guides as you darken the lines but make the shape a bit wavier.
Step 18: Finish drawing the rest of Nemo's body by following the initial guide lines.
Step 19: Draw a few long, wavy lines inside the body to give Nemo his distinctive clownfish pattern. Draw a pair of curved lines near the head. Use the initial circle as a guide to place the lines. Add another pair of lines across the middle section of the body and a final pair of shorter lines near the Nemo's tail.
Step 20: That’s it! You now have a nice sketch of Nemo, the clownfish from Disney's Finding Nemo and Finding Dory. You can stop at this quick drawing for a rough, sketchy look, or continue to the next step for a more finished look.