Sea Emperor Leviathan Baby

In the future, five Sea Emperor eggs will be found in the aquarium of the Primary Research Facility, being kept by the Precursor Egg Incubator.

These eggs cannot hatch due to the environment being built to match the ideal conditions for an adult Sea Emperor, rather than a baby Sea Emperor. As a result, the eggs themselves are hundreds of years old.

These eggs must be hatched by using certain items at some point in the story, after hatching, the juveniles will play with their mother for a short time, who will then escort them to Precursor Teleporters that they will leave the facility through, juvenile Sea Emperors will be spawned in the world after this.

The juvenile Sea Emperors, like their mother are also able to produce large quantities of Enzyme 42. Though it is unknown if all Sea Emperors were capable of this.