The watercolor painting technique highly depends on the paper quality. The secret of a good quality paper is that it can hold multiple paint layers better than cheap paper. I have used a cold press Arches watercolor paper for this painting. This paper literally made for a loose painting style, and I am still getting used to painting on this type of paper. Experimenting with color combinations on the diverse paper quality, you can determine what better works for your painting technique.
In this video, you will see the watercolor painting process of a Blue Betta fish.