Befriending Fish
Gain information by befriending the fish. You can do this by petting them or poking them by pressing the A button. Try feeding them, writing on them with an underwater pen and swimming with them. You can only swim with the larger fish such as the whale and dolphin, but you will learn a lot of information from your underwater friends.
Seasons
Use the four seasons to find specific fish. Some fish only come out during certain times of the year, so you will need to explore all four seasons to find all of the fish. The calendar is displayed throughout the game. Summer is June 1 through August 31. Fall is September 1 through November 30. Winter is December 1 through February 28 and Spring is March 1 though May 31.
Treasure Locations
Find the treasure locations by going to these places on the map. The letters are located at the top of the map--use your finger to slide down the numbers on the left hand side to find the locations. To find the necklace, go to D5, and the tiara is at D6. The storyboard pieces are located at E1, F6, H3 and K7. You will find the compass pieces at B8, H1, J9 and M1. The mirror pieces can be found at D/E2 and D/E3, K 1/2 and L3.
White Mother
Find all 642 fish and record them in your fish journal. This will take some time to accomplish, but you will get a reward for doing so. After you have recorded the last fish, the white mother will appear in the aquarium. You will get a message from your assistant Katherine and you can add up to four more white mothers to the aquarium.