Start by sketching out your pelican in pencil on a piece of paper. Use a reference photo to help you get the proportions and details right. Once you're happy with your sketch, start painting!
Use a light blue or green for the sky, and a darker blue for the ocean. Paint the pelican white, with gray shading on the wings and body. Add a touch of yellow to the beak.
For the final touch, paint a few waves crashing around the pelican as it dives into the water. Use white paint to create the illusion of foam. And that's it! You've now painted a pelican diving into the ocean.