Open Illustrator and place sketch into a new art board.
Trace the shark with the pen tool, use a 2pt black stroke.
4. Make the shark look as real as possible, using:
textures, colors, gradients and whatever else you feel comfortable with.
The shark is under water so your light source must be from above or from the side.
i can do this with in few hours,it is very very simple job.we really like to draw your shark and add colors on it,please award us now to start his job thnaks