Currently all the fish we can get are 10q perches. How come? This has not changed since I started playing, and to be honest screams "placeholder". Where are the fish cakes and fried fish? Where are the fish qualities? Where are the nets (which require swimming to use and hence provide a payoff for the danger)? Where are the different kinds of fish? Bait to increase chances of some fish kinds, quality, rate and other things (maybe combine hook and bait into kinds of "tackle" which use worms/flies/bread/veggies and/or feathers/flowers and/or metals for hook)?
Especially if you add boats, fishing will be even more blatantly unfinished. I think a good way to handle it will be overlaying a few distribution maps for each kind of fish on the map which are used when you fish. Also, have fish quality be affected by fishing rod/net/bait and water quality.
It's just weird that fish are given so little attention, especially given the prominence of fishing in actual Scandinavian settings.