Start with simple shapes like circles, ovals, and curves
Draw the basic outline of the sea animal
Add fins, tails, shells, or flippers
Sketch the eyes, mouth, and other facial features
Refine the body shape and proportions
Add details like scales, stripes, spots, or texture
Erase extra lines and clean up the drawing
Outline the final drawing with darker lines
Color the sea animal using suitable shades
Add water, bubbles, coral, or seaweed if desired