No help. I bred 440 fish in about 6 days. I have no recollection of which I may have missed, especially since I was following the same breeding pattern for every type of fin. Having done that, I should not have missed any, but it says I did.
Has anyone opened up the save file in a text editor? All the fish types are listed at the bottom of it, but I cannot see anything that would give me a clue that I was missing a fish.