Step 6: At the top of the circle on the left, draw a curved line as the guide for the nurse shark's dorsal fin. Draw a vertical line to the left to finish the guide for the dorsal. Farther to the left, draw a similar shape but smaller as a guide for the second dorsal fin.
Step 7: On the bottom, near the middle, draw another shape similar to the shark's dorsal fins, only upside-down, as a guide for the pectoral fin. To the right, below the circle, draw a similar shape, but smaller, as a guide for the pelvic fin. Farther to the left, draw an even smaller triangle-like shape as a guide for the shark's anal fin.
Step 8: On the top, left side of the body, draw a long, curved line as a guide for the nurse shark's tail or caudal fin. Now draw another curved line below it to make the shape thicker. Now draw another curved line below it to make the shape thicker. The bottom line curves down and then angles to the right toward the body.
That's it for the guides! From this point on, press harder with your pencil for a more defined drawing.
Step 9: Lightly sketch the eye inside the head, near the top, as a small circle. When you get the size and position of the eye right, draw a short line at the top for the heavy brow. Now darken the bottom edge of the circle to finish the shape of the nurse shark's eye. Inside the eye, draw a small, thin slit for the pupil. Draw a curved line under the eye for extra detail on the skin. Add a line higher up on the eye to emphasize the thick brow.