Chozo Seal

A Chozo seal is a gate of Chozo design that controls the levels of dangerous liquid on SR388. They will appear in the forthcoming game Metroid: Samus Returns, a remake of Metroid II: Return of Samus.

The seals appear as large ornamental structures in the background, and feature ten icons, five on each side, representing Metroids. The number of Metroids in a particular area will be indicated by these icons being lit purple. Samus must then explore the area to locate all the Metroids and destroy them, collecting their DNA after each kill. She can then return to the Chozo seal and upload her collected DNA. After doing so, the Chozo seal will activate and lower the liquid levels, allowing her to continue to the next area.

In the original Metroid II, these seals were not present; Samus would simply have to kill all Metroids in an area, and the liquid levels would lower with a noticable earthquake.