Loved it. This is a well-tuned, relaxing fishing RPG. I played it for hours.
I was going to try to get all the fish, but I only got to 53 before encountering a crash. For context, I had 3365g, 26 fish, all the upgrades, and was attempting to dock at Crescentia, and it was during the New Moon phase.
You're probably already well aware of this, but fishing spots spawn on land tiles :).
There's a tiny spot in the middle of the ocean, west of Valeshire and East of Mingantia, where you can dock at Valeshire. Another one, just northeast of the Z-shaped island in the chain trailing north of Crescentia, docks at Crescentia. There may be other such spots, but I did not find them. As far as bugs go, this one is rather charming.
Wonderful, wonderful experience, and a great entry!