The Sea Emperor's Eggs

1. (Shell) Uncommonly strong shell lining. Organic growth on the exterior suggests these eggs may be hundreds or thousands of years old.

2. (Alien Tubes) Alien devices penetrate the outer shell layer. Likely designed to supply them with nutrients, and to isolate them from the surrounding environment.

3. (Amniotic Sack) Like many eggs on 4546B, these do not contain a nutrient supply which is slowly exhausted by the embryo. Instead they exist in a form of natural stasis, awaiting appropriate hatching conditions.

4. (Fetal Organism) There is a high genetic match between these organisms and the leviathan in the vicinity. They appear to be stable and healthy.

It is likely that ideal hatching conditions for the eggs vary considerably from ideal survival conditions for the parent.