Step 1: First, you'll draw the head and curling tentacles leaving a space for the rest of the body.
Step 2: Then draw in the large eye above the mouth.
Step 3: Next draw in the back and the long wavy fin on the side.
Step 4: Finally, you'll draw the belly and the other long wavy fin on the other side.
How to Draw a Cartoon Cuttlefish – Step-by-Step Tutorial