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Note on Scope
This biome page was authored from pre-launch materials. The name does not appear in the shipped Early Access build's region list, which as of September 2026 covers Coral Gardens, Sparse Plains, Karakorum and the Void, with Xanadu announced but out of bounds. The page is kept as a development-history record of a name that circulated before launch, not as a confirmation that the area exists in the game. See Biomes for the confirmed list.
The Jelly Plateaus is a biome on Proteus in Subnautica 2. The name was discovered by community members who spotted file names visible in the background of a dev vlog video. It implies a plateau-style environment combined with jellyfish or jellyfish-like organisms as a defining feature.
What the Name Suggests
The biome name combines two elements: "plateaus" (flat, elevated terrain features) and "jelly" (suggesting jellyfish-like organisms or gelatinous biological structures). This points to an environment with broad, flat surfaces at depth, populated by bioluminescent jellyfish-like creatures that define the zone's visual identity and ecology.
Descriptions from the Proteus article suggest the biome features thermal vents that provide geothermal energy sources, potentially useful for base building and power generation. If thermal vents are present, the biome could serve a practical role in the crafting progression by offering a favorable location for establishing a powered base.
Discovery
The biome name was identified through file names visible on a developer's screen during a dev vlog, the same method used to discover other Proteus biome names including the Coral Gardens, Kelp Forest, Sparse Plains, Overgrown Ruins, and World Tree. These names may change before or during Early Access.
What Remains Unknown
Its Early Access status is settled: the Jelly Plateaus is not among the regions that shipped, so it is either a pre-launch working name for an area that was renamed, or content held for a later update. Everything else about it is unknown, and none of it has been addressed in a patch note or dev vlog since launch:
What the jellyfish-like organisms look like, and whether they are passive ambient fauna, interactive, or hostile.
Depth range and where the area would sit in the progression.
Whether thermal vents are present, and whether they would support base power.
Which resources the area would carry.
Whether the Blight or the dynamic weather system would affect it.