Get Mermaids
Place the mermaid statue in a tank with water in it. The statue will begin to shake and will become a mermaid.

Hector Dolphins
Name a Bottle Nose Dolphin "Hector" and you will have a Hector Dolphin.

Seahorse
Name a guest "Horse" and go to the adopt an animal screen and the seahorse will be there.

The Angel Fish
Name two of your guests Fins and you will get the Angel Fish.

Unlimited Money
Press $ and shift and hold them and watch your money go up rapidly! But to make sure there is no pain in getting millions of money make sure you do it at the beginning of the game when you have no enclosures otherwise the tanks will get dirty.

Change pointer hand color
Press [Ctrl] + C.

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

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

Unicorn Exhibit
Rename an exhibit to Xanadu to see the unicorn exhibit.

Scared female guests
Name a male guest rpro.

Scared child guests
Name a male guest Boogyman.

Set all tour guides salaries to zero
Name one of the tour guides Rosalie.

Fix all broken fences
Name a male maintenance worker Bob V.

Remove foliage and $300 tax rebate
Name a male maintenance worker George W.

Destroy all buildings
Name male maintenance worker The Rock.

Deinosuchus
Name an exhibit Super Croc.

Halloween zoo
Set your system date to October 31 and all guests and buildings will turn orange and black. You can also see buy a jack-o-lantern at the buildings and items menu and see a witch fly overhead. Note: The last effects also happen on game date October 31.

Santa Claus
On game date December 25, Santa Claus will fly overhead.