The Rainbow Fish was one of my favorite books as a child so I knew I had to do this design someday. I've seen this idea for the first time at The Nailsaurus. And yesterday I stumbled upon this tutorial from little nails on how to do mermaid nails.
I used mainly colors from Catrice and Essence - Gleam In Blue as a base color. I added the dots with a dotting tool but in the end just used the brush that came with the polish. Since it's really time-consuming I only did one hand this time and left my other nails with the base color.
One coat of BTGN Top Sealer which caused a tiny bit of smudging.