Step 7 - Add Coloration and Keel Details
Next draw in a 'ragged-edged' line indicating where the dark coloration of the back changes abruptly to the pale coloration of the belly. Note that this line makes a series of arches from head to tail, actually extending onto the pelvic fins. Note that there is an irregular pale patch on the lower lobe of the caudal (tail) fin. Add a dark spot at the axil (a shark's 'armpit') and shading guidelines above and below the keel.