Subnautica 2 Biome and Region Map Guide: Every Region and Where It Sits

Subnautica 2’s map is organized into regions, and each region holds a cluster of biomes. Getting the layout straight early saves you a lot of confused swimming, because the game does not hand you a tidy overview map. You learn the place by going there, and going there is dangerous if you do not know what is below you.

This is the full region breakdown for the current Early Access build, with depths and the landmarks that actually help you navigate. For turn-by-turn directions between points, pair this with the navigation guide; for the existing detailed map, see the map guide.

Coral Gardens region: your starting world

The Coral Gardens region is the shallow, comparatively friendly part of the map where you spend the early game. It is the biggest cluster of biomes, six of them, and most of your first hours happen here.

• Shallows (0 to 224m). The classic starter zone. Resources, basic fauna, your first bases.
• Dolerite Spires (0 to 128m). Rock spire terrain, good for early materials.
• Plateaus (23 to 119m). Open shelf terrain.
• Graveyard (0 to 266m). This one matters. The Tadpole Pens sit inside the Graveyard biome at roughly 148m, and that is where you scan the Scout Ray chassis.
• Necrolei Hills (0 to 100m). Shallow hill terrain.
• Lead Zone (34 to 65m). A narrow band, lead-associated.

The Coral Gardens are where you learn the game’s rhythm before it gets nasty. The depths are forgiving and the threats are manageable. Build your first base here. The first base guide covers good starter spots.

Sparse Plains region: rich and guarded

The Sparse Plains is a single biome that punches above its size. It runs 0 to 250m and is described as resource-rich, which is the good news. The bad news is that a Collector Leviathan patrols a trench within it.

That is the whole character of this region. The resources are worth the trip, and the leviathan is the price of admission. Bring a vehicle, hug the terrain, and treat any visit as a quick in-and-out. Do not free-swim the open plain when the Collector is hunting, because outside a vehicle it is an instant kill.

Karakorum region: the deep industrial zone

Karakorum is where the map gets serious. Four biomes, several of them deep, and a lot of the mid-to-late game material runs happen here.

• Observatory Island (0 to 600m). A vertical biome dropping from surface terrain down deep.
• Karakorum Power Plant (0 to 827m). The deepest single biome on the playable map. Industrial structure, deep approach.
• Root Canyon (364 to 750m). A deep canyon biome. Two notable wrecks live here, Stairway to Heaven and the Therapy Room. The Stairway to Heaven area is also one of the Haul Chassis fragment locations.
• Karakorum Metal Farms (0 to 500m). Metal-rich and important, but the second Collector Leviathan patrols over it. This is a Haul Chassis fragment site too, around 465m, so expect to come here and expect company.

Karakorum is the region that teaches you to respect depth and to plan your power and oxygen before you commit. The oxygen guide is worth a read before deep Karakorum runs.

Notable locations to keep straight

A few named spots get referenced constantly, so here is where they actually sit:

• Tadpole Pens. Inside the Graveyard biome, around 148m. Scout Ray chassis scan.
• Stairway to Heaven and Therapy Room. Wrecks in Root Canyon.
• Needler Nest. A databox location around 295m. A Haul Chassis fragment is found inside it, so it shows up in vehicle hunts.

These are the landmarks the community names without always saying which biome they belong to, which is why people get turned around. Anchor them in your head to the regions above.

The Void: do not go here

Beyond the Early Access Barrier sits the Void, listed in the “Other” category and spanning a brutal 0 to 3100m. It is described as a wet desert five thousand meters deep, and it exists mainly as a boundary.

The moment you cross the barrier into the Void, the Shiver Leviathan shows up. These predators travel in packs called shivers, they are aggressive, and they will attack even large submarines. The wiki’s verdict is short: avoid.

The Void is not content to explore. It is the wall at the edge of the playable map with a leviathan enforcing it. Treat crossing the Early Access Barrier as a death sentence unless you are deliberately poking the boundary and ready to die for it.

How to read the map as you go

A few habits that make the regions click:

• Depth tells you the region. If you are above ~250m in shallow, colorful terrain, you are in Coral Gardens. Once you are pushing past 400m into industrial structure, you are in Karakorum. The numbers are your compass.
• Resource-rich means guarded. Both the Sparse Plains and the Karakorum Metal Farms are rich and both have a Collector Leviathan. The pattern holds: the best loot zones come with an apex predator.
• Drop beacons at region edges. The map does not give you a clean overview, so mark the entrances to dangerous regions. When something is chasing you, a beacon at the edge tells you which way is out.
• Build forward bases. For deep Karakorum work, a small outpost partway saves you from one-shot oxygen math and gives you a fallback if a leviathan run goes wrong.

That is the current Early Access layout. Coral Gardens to learn, Sparse Plains and Karakorum for the real resources under leviathan guard, and the Void as the hard wall you do not cross. The map will grow as Early Access continues, but these are the regions you are working with today.