The art of fish rubbing, and smelly fingers.
The hard part. Gills out, paper towel up every orifice, dry, spray with isopropyl alcohol, dry again, repeat until no slime.
Block placement for pinning fins
Inking up. I find a sponge works better than a brush.
My four favourites
Still contemplating whether or not to do spots at this stage
Props to Ray Montoya for the tips! I actually preferred the quality of the other final one, but this one was truer to the actual fish so I decided to go with it instead.