Step 15: Use the small arc on the right side as a guide to draw the seal pup's hind flippers. Follow the basic path of the guide as you draw the shape of the hind flipper and add the lines for the digits too. Add another curved line at the top for the seal's other hind flipper peeking from behind.
Step 16: For a cleaner look, erase as much as you can of the initial guide lines. Don't worry about erasing all of the guides. It's okay to leave some behind. You can also LIGHTLY erase some of the final lines so that the white pup doesn't have thick outlines. Re-draw any final sketch lines you may have accidentally erased.
Final Step: Add some shading to your harp seal pup drawing to give it more dimension and volume. Pick the direction of the light source when shading so that the shadows are consistent with it. Vary the pressure on your pencil to get different degrees of tonal value.
As you shade, use strokes that go in the general direction of the fur. Harp seal pups are all-white, so the shadows will be the only value you add to the body. You can add as much or as little shading as you'd like. You can also skip this step entirely. Shading can be time-consuming, so be patient and take breaks.
Add a cast shadow underneath. This helps ground the seal pup so it doesn't appear to be floating. It's always a good idea to use reference when you draw. Don't forget to pause the video to draw at your own pace.