Zoo Tycoon: Marine Mania (PC)

More money
Press [Shift] + 4 to get more money. Be warned, this will also make your water dirty...

Change pointer hand color
Press [Ctrl] + C.

Unicorn
After the game names an exhibit, rename it to Xanadu.

Hints

Mermaid
Put the mermaid statue in a marine tank.

Photo Boot
Unlock the Shark World level and the Photo Booth will also be unlocked in the structures menu.

Animated decorations
If you put the clam or treasure chest in a tank filled with water, both will open and close. Neat!