Sea Gates

Sea Gates are gates that allow travel between the domes of the Matoran Universe

History
Sea gates were created as a part of the Matoran Universe that would allow travel to the various domes of the universe. They were connected by canals of liquid Protodermis.

Metru Nui
Located along the great barrier, the Metru Nui Sea gates were used to travel in and out of the city. Roughly seven gates existed.

Shortly before the Great Cataclysm, all the Sea Gates were closed off by members of the Toa Mangai. One Gate was later reopened to admit the Dark Hunters Nidhiki and Krekka.

Northern Continent
The Northern Continent possessed the largest amount of Gates, at 9, leading to the regions surrounding it save Karzahni. As such, the Northern Continent often served as a hub of travel to other domes.

Shortly before the Great Cataclysm, the two Sea gates leading to Metru Nui were closed off.

Southern Continent
The Southern Continent Sea Gates were fewer, at only 6. The Gates leading to the Southern Islands were almost never used.

At one point, the Tren Krom Peninsula Gate was closed by a group of Toa from the Southern Continent, and a Matoran settlement was built on the mouth of the gate, effectively barring that gate permanently.

Other
At some point early on, a dispute arose between Zakaz and Xia over who controlled the gate connecting them. This eventually led to a halting of travel between the two. However, it was eventually reopened due to trade issues.

At one point, a Matoran named Flidus set up a ferrying business between Stelt and Xia.

Landscape
The Sea Gates varied in their appearance, but all consisted of a canal of liquid Protodermis, connecting to the ocean that surrounded each island. Well-traveled gates, such as the ones around the Northern Continent, were typically spacious and clear, whereas ones like the Southern Island Chain gates were narrow and often blocked in some way.

The interior was often rock or metal, and could usually be closed from either end.