How do you sell fish ?
When you have grown up fish, drag them in the selling tank (tank $-----the third tab in the main screen) and then click on the button "sell fish" . This will direct you to the FISH STORE and you will see little people walking around. On the bottom you will have all the info you need: how many fish you still have to sell, your money, and a sign when a fish is sold with the picture of the fish..
How do you turn your aquarium into a screensaver?
You can click on the "Screensaver" button on the bottom right corner of your tank. This immediately tranforms your game into a screensave: it will hide the user interface and fill your screen completely with the aquarium.To go back to the game, just click anywhere on the screen.