Draw a large oval for the body
Add a smaller rounded shape at one end for the head
Sketch a pointed snout
Draw a curved dorsal fin on top
Add two side flippers near the front
Draw a horizontal tail fluke at the back
Refine the body into a smooth torpedo shape
Add the eye near the front of the head
Draw the white eye patch above and behind the eye
Add the white underside patch along the belly
Sketch the white saddle patch behind the dorsal fin
Outline the black-and-white pattern clearly
Erase extra guide lines
Darken the final lines
Color the body black and the patches white