If two or more Multipurpose Rooms are stacked on top of each other, building Alien Containments inside each room will cause the Containers to merge into a singular, larger tank. Non-edible fish can be added through the use of their respective eggs. The player can then enter the Alien Containment and release caught fish into it. In order to get inside of-or put fish into-the Alien Containment, the player must build a Hatch on the side.
