Legendary fish not crossed on map

[Anthony]

Hi guys. Searching on internet I have found out that, once caught, an X appears in the map on the icon of the legendary fish. The same happens with the legendary animals. I have caught all the legendary fish but not a single one is marked with an X… in fact, I have also completed the quest concerning the legendary fish. So, why? Maybe they can be caught once more (outside the quest) and then they will be marked? Or what? What do you think?

[Jammin Jim]

I am almost certain legendary animals can only be caught once. It should appear after you caught it and completed the mission with it so I am not sure why it isn't showing for you.