Everything starts with an accurate research in the existing scientific literature about the species of interest. The taxonomic characters (e.g. exact number of dorsal spines, scale type), the right colours that are not affected by the light dispersal along the water column, by the death of the specimen or more commonly, in the ichthyological field, by the analysis of specimens outside of the water medium have to be determined. In the latter case, the use of underwater pictures assumes cardinal importance.
Being myself a marine biologist and a addicted certified dive master with the passion for underwater photography and with a lot of bright researchers and scubadivers buddies around the world I have access to a broad database of species that helps my work. After this stage, is time to impress all these information on an electrical paper sheet by using digital art. The end result is an image with high definition standards (full HD or 4K depending on the levels used), rich in details and super realistic.