Step 15: Darken the big triangle-like shape at the top to create the first dorsal fin. Make the shape curvier as you darken the guides, especially the left side.
Step 16: Use the shape on the left as a guide to draw the nurse shark's second dorsal fin the same way.
Step 17: Use the long shape on the left side as a guide to draw the first part of the shark's caudal fin. Darken the basic path of the guide but make the lines curvier, especially at the bottom.
Step 18: Draw an angular shape around the tail to complete the shape of the caudal fin. Draw a triangle-like shape at the bottom so that it almost looks like another separate fin. Then continue drawing the line upward so that it's almost parallel with the inner shape. At the top, draw the tip of the caudal fin using a few short, angled lines. The tip of the nurse shark's fin is similar to two tiny triangles pointing left.
Step 19: Use the remaining lines as guides to draw the rest of the body. Simply darken the outer edges of the initial guides to create the shape of the body. Don't overlap the fins as you darken the outline of the nurse shark's body.