Running out of room on your park? Unlocked at level 2, you can clear up some space by placing some dinosaurs in the asset repository. Tap and hold the dinosaur you wish to move, and now instead of just the red X and green check mark, you will see a blue button with a downward facing arrow. Tap the blue button to place your dino in the repository. When you are ready to bring your dinosaurs out again, simply tap the repository building to open it, and then tap the blue button with the upward facing arrow.
You can have a maximum of 99 dinosaurs on your park at one time. If you would like to take a specific dinosaur out of the repository you will first need to place an existing dino into the repository first.
Note: Once placed in the Asset Repository, dinosaurs do not generate coins, cannot be fed, and petting mode is unavailable.