Leviathan Observation Center and Hatchery.It is believed that the largest creature in existence could live at the bottom, however all teams sent by Alterra never come back.

The Void - the Void is a bottomless biome located on the southern and western edges of Sector 2, it acts as the barrier of the world on those sides and the Arcitc glaciers in the Arctic Zone on the other directions.Only Reaper-Shark Leviathans, Silver Sharks and peepers are a common fauna found here. Wasteland - A biome filled to the brim with harmful radiation, due to the crash of the Alterra freighter, Solarwing recently.Because of the pitch black of the biome you will not see any fauna here, the only thing on the Leviathan that can be seen is its glowing red eyes. One Grand Demon Leviathan can be found here. The Abyss - a pitch black biome that leads from the Forsaken Zone and into the Inactive Lava Zone.Forbidden/ Forsaken Zone - This zone is a dark and deep biome that has many bioluminescent fauna and flora, including: Gabe's Feather, Blood Kelp, Ghost Root, Bloodshroom, Ghost Ray's, Zone Prowlers and the occasional Murky Peeper.This biome houses an entrance to the Forsaken Zone. It consists of a forest housed in some sort of crater as well as the caves below it called the Bone Caves. Murky Jungle - The Murky Jungle is a semi-deep to deep biome that replaces the kelp forests and the Lost River.The Sea Emperors - A group that is opposed to Alterra formed by Ryley and Robin.Their main base in the Great Planes/Sector 2 is located on. Alterra - Alterra has been causing much of the planet harm, they have been experimenting on fauna, flora and destroying ecosystems to build factories and bases.Ryley Robinson - One of the leaders of the Sea Emperors, a rebel group apposed to Alterra.

Robin Ayou - One of the leaders of the Sea Emperors, a rebel group apposed to Alterra.

Member of the Sea Emperors can be chosen by player to be boy or girl.

Charlie Goodall - Protagonist of Subnautica: Frontier.

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