Hung Pham discusses the importance of colour and lighting in this vibrant image
I first pulled out stocks related to water, such as fish, bubbles and waves, I then tried to arrange and manipulate them to make the fish look like they were swimming.
By using the Soft Brush Tool and Clipping mask, I started to form more lighting for the model and other elements. To create depth of field and motion, I manipulated more elements in the foreground and background, and then applied motion Blur to them.
This is a very important step of mine. I always use Selective Color to adjust the colours before I finish my artworks. In this case, I pushed up the Cyan, Blue and Yellow. For the shadow, I turned the Black to Dark Blue.