I finally found two big flatfish somewhere in an lootbox in a hut. Sadly, I can't remember where the hut was located, but im pretty sure that it was not part of any active (side-)quest. By the way: I couldn't reproduce finding the two big flatfish by loading an earlier savegame (that's also why I didn't keep in mind, where the hut was located, because I thought it might be coincident). Perhaps ubisoft made the finishing of the fishing challenge part of some upcoming (side-)quest, and the two big flatfish were in that lootbox just by accident? Reminds me a little on that Nodens Arc Bow, which I luckily found before they could "fix" it.

I finally found two big flatfish somewhere in an lootbox in a hut. Sadly, I can't remember where the hut was located, but im pretty sure that it was not part of any active (side-)quest. By the way: I couldn't reproduce finding the two big flatfish by loading an earlier savegame (that's also why I didn't keep in mind, where the hut was located, because I thought it might be coincident). Perhaps ubisoft made the finishing of the fishing challenge part of some upcoming (side-)quest, and the two big flatfish were in that lootbox just by accident? Reminds me a little on that Nodens Arc Bow, which I luckily found before they could "fix" it.