At the far end of the Antechamber is another door blocked by a force field that leads to the Moonpool Room, along with its respective Forcefield Control, requiring a Blue Tablet.

Accessed by ramps on either side of the entrance to the facility, another doorway can be seen, this door leads to the 'Dissection Lab'. There are six doorways around the sidewalls of the Antechamber, the four doors positioned at diagonals lead to Arch rooms, the middle left door leading to the 'Pipe Room', and the right to the 'Egg Laboratory'. Around this pillar are cases containing the Alien Relics, five on each side. Every time the deposit on it is completely depleted the pillar will rise up and, after a while, fabricate a new deposit, after which the pillar will lower back down. A large pillar, called the Ion Cube Fabricator, lies in the center of the chamber, which is used to create Large Ion Cube Deposits. It is huge and roughly octagonal in shape. The first room in the Primary Containment Facility. But the aquarium was not a suitable environment for the eggs to hatch which was built to match the ideal environment for an adult Sea Emperor Leviathan, which differ from the ideal conditions for a juvenile Emperor, causing the eggs to go into a form of natural stasis for a seemingly indefinite amount of time, kept alive by the Incubator. Five of the eggs that the Sea Emperor Leviathan was found with were placed in the Incubator Device to stimulate the hatching process as it was deduced that the young would be a more viable source of the cure, rather than their parent who was weak.

Over time, the aquarium became a thriving ecosystem with the Sea Emperor Leviathan at the heart. However, as creatures began migrating into it via the Arches, they brought with them flora seeds along with loose sand and mud. The aquarium section was originally all inorganic with two Alien Arches set up inside, one leading back into the Antechamber's moonpool and another leading to just outside the Quarantine Enforcement Platform. It was built to contain the Sea Emperor Leviathan after it was discovered that it was immune to the Kharaa Bacterium. Five Sonic Deterrent devices can be found in the area around the base, preventing attacks on the facility from the native fauna. The Primary Containment Facility, like the other Alien Bases, was built a little under one thousand years ago. The Primary Containment Facility requires the Blue Tablet to unlock, which is found in the Alien Thermal Plant. There are two entrances to the Lava Lakes containing the Primary Containment Facility co-ordinates are -300 -1270 -150 and 90 -1240 360, southeast, and directly north of the Lava Castle, respectively. It was built by the Precursor Race around one thousand years ago and is home to the last remaining Sea Emperor Leviathan, along with the five remaining Sea Emperor Leviathan Eggs. The Primary Containment Facility, also known as the Emperor Containment Facility, Sea Emperor Prison or merely the Prison, is an Alien Base located within the Lava Lakes that serves as the final major story location.

Igp subnautica sea emperor