Just catch fish anywhere. The fish you catch in-game are submitted to the tournament. Check out current standings to find out what fish qualify.
Thanx, but I have been playing this game for over a month and I still don't have ranking even though it tells me that ranking is available and I've caught numerous fish and my level is fisher king and also I ve been to all the places you can go and completed most of the missions except catching every species and getting an s on all the ones I caught.Do I have to start a new game cause I don't get why I can't get ranked.
Not all of the fish are in each tournament. When a new tournament starts they pick a certain number of fish (20?) and catching those count towards the tournament, any other fish you catch aren't counted. You can see which fish are in the current tournament by using your computer in your room.