After tutorial I wanted to make some things differently and made another fish.
The main details such as gills and eyes are made in a different way, some of it I like and some not so... I tried to make eyes easy way - just a soft black ball and some knitting yarn around it but really I prefer the eyes to be more prominent. Gills are OK though.
I was asked how I worked inside the fish with such a small opening. The matter is that I do work inside first just after I cut the mouth and the felt is soft yet so it could be pulled slightly. The first layer of wool is usually Kap Merino which became firm and smooth very quickly. When I start to full the felt with "all my might" there is no need to go inside it's already done in there. After fulling the felt shrink a lot and the opening become much smaller. Now I couldn't put my hand inside!