Biomes are the distinct environmental zones that make up the alien ocean planet in Subnautica 2. Each biome has its own depth range, terrain, resources, flora, fauna, and danger level. Learning the biome layout is essential for efficient exploration, because the resources and creatures you need are tied to specific zones.
Biomes generally fall into three depth categories:
- Shallow biomes (0-100m): Safe starting zones rich in basic resources like titanium, copper, and food. Solar-friendly and leviathan-free.
- Mid-depth biomes (100-400m): Transition zones with rarer resources, moderate creature threats, and important wreck sites for blueprints.
- Deep biomes (400m+): Endgame zones with the rarest materials, story content, alien ruins, and the most dangerous leviathans. Require upgraded vehicles.
As you progress, you unlock vehicles and depth upgrades that let you access deeper biomes. Each new biome tier introduces new resources needed for the next tier of crafting, creating a natural progression loop. Always scan new flora, fauna, and outcrops when you enter a biome for the first time, as PDA entries reveal what resources and dangers to expect.
Note that because Subnautica 2 is in early access, the biome list may expand or change with updates. New zones and creatures can be added, and existing biomes may receive additional content during development.
Understanding Biomes in Subnautica 2
Biomes are the distinct environmental zones that make up the alien ocean planet in Subnautica 2. Each biome has its own depth range, terrain, resources, flora, fauna, and danger level. Learning the biome layout is essential for efficient exploration, because the resources and creatures you need are tied to specific zones.
Biomes generally fall into three depth categories:
- Shallow biomes (0-100m): Safe starting zones rich in basic resources like titanium, copper, and food. Solar-friendly and leviathan-free.
- Mid-depth biomes (100-400m): Transition zones with rarer resources, moderate creature threats, and important wreck sites for blueprints.
- Deep biomes (400m+): Endgame zones with the rarest materials, story content, alien ruins, and the most dangerous leviathans. Require upgraded vehicles.
As you progress, you unlock vehicles and depth upgrades that let you access deeper biomes. Each new biome tier introduces new resources needed for the next tier of crafting, creating a natural progression loop. Always scan new flora, fauna, and outcrops when you enter a biome for the first time, as PDA entries reveal what resources and dangers to expect.
Note that because Subnautica 2 is in early access, the biome list may expand or change with updates. New zones and creatures can be added, and existing biomes may receive additional content during development.
Complete Biome List and What to Find
Here is a comprehensive list of the major biomes in Subnautica 2, organized by depth tier, with key resources and notable dangers for each.
| Biome | Depth | Key Resources | Notable Dangers |
|---|---|---|---|
| Safe Shallows | 0-50m | Titanium, copper, food fish, limestone | Very safe, minor fauna |
| Kelp Forest | 30-100m | Titanium, creepvine seeds, lubricant | Stalkers, moderate predators |
| Grassy Plateau | 50-150m | Sandstone, silver, gold, lithium | Sandsharks, bone sharks |
| Mushroom Forest | 100-200m | Lithium, gel sacks, rare flora | Ampeels, moderate threats |
| Underwater Islands | 150-300m | Shale, diamonds, lithium | Bone sharks, depth pressure |
| Deep Reef | 200-400m | Diamonds, lithium, deep materials | Crabsnakes, darkness |
| Volcanic Vent Zone | 300-600m | Kyanite, sulphur, rare ores | Thermal Wraith, heat damage |
| Deep Trench | 400-800m | Rare materials, story items | Abyssal Serpent, leviathans |
| Abyssal Void | 800m+ | Endgame resources, story ruins | Collector Leviathan, extreme depth |
The Safe Shallows are where you start. Rich in titanium and food, this is your home base zone. The Kelp Forest provides creepvine seeds for lubricant, an essential crafting component for vehicles. The Grassy Plateau introduces sandstone outcrops with silver and gold, needed for advanced wiring and computer chips.
The Volcanic Vent Zone and Deep Trench are where the rarest endgame materials spawn, including kyanite and sulphur. These zones require fully upgraded vehicles and are patrolled by the most dangerous leviathans. Plan expeditions here carefully, bring backup power cells, and never travel without sonar.
Biome Exploration Tips and Safety
Exploring biomes efficiently and safely requires strategy. Here are the most important tips for navigating Subnautica 2's diverse zones:
- Match your vehicle to the depth: Never enter a biome deeper than your vehicle's crush depth. Upgrade before exploring.
- Scan everything new: First visits should focus on scanning flora, fauna, and outcrops to populate your PDA with useful data.
- Bring storage: New biomes mean new resources. Equip storage modules so you can haul materials back in one trip.
- Watch for leviathan audio cues: Deep biomes are leviathan territory. Listen and be ready to retreat.
- Set beacons at biome entrances: Mark the edge of each new zone so you can navigate back and find it again.
- Visit during day when possible: Visibility matters. Deep biomes are dark regardless, but shallow and mid zones are easier in daylight.
- Build forward outposts: A small powered base at the edge of a deep biome zone saves long round trips.
- Carry medkits and backup power: Always assume something will go wrong in unfamiliar territory.
In co-op, split the group to explore adjacent biomes in parallel, then regroup to share scans and resources. This multiplies your discovery rate. However, keep communication open so if one player encounters a leviathan, the whole team can adjust their routes.
Understanding biomes is the key to mastering Subnautica 2. Once you know where each resource and threat lives, you can plan efficient loops that keep you supplied and safe at every depth. Explore methodically, upgrade steadily, and the entire alien ocean becomes your domain.