⚠️ UNDER CONSTRUCTION

This project is still in development. Features may change.

EXPLORER

Browse the Alterra database

FaunaFloraBiomesMap
MaterialsCraftedToolsEquipmentSurvival
VehiclesBaseMiscellaneous
About UsReport an IssueLegal Notice

Social Media

TikTokInstagram

© Subnautidex

v1.0.0

Biomes

20 records available

GENERALDANGEROUSDEEP

GENERAL

15
Bulb Zone
biomes

Bulb Zone

A visually striking area filled with giant, bioluminescent purple and blue bulb bushes.

View details →
Crag Field
biomes

Crag Field

A dark, rocky area with jagged spires jutting from the ocean floor. Home to many Mesmers and Bonesharks.

View details →
Dunes
biomes

Dunes

A massive, sandy expanse on the edge of the crater. Extremely dangerous due to a high concentration of Reaper Leviathans.

View details →
Floating Island
biomes

Floating Island

A terrestrial island suspended entirely by ancient floaters. Features lush flora and abandoned Degasi bases.

View details →
Grand Reef
biomes

Grand Reef

A deep, expansive biome featuring glowing Anchor Pods and Membrain Trees. Patrolled by Ghost Leviathans.

View details →
Grassy Plateaus
biomes

Grassy Plateaus

Vast, flat, sandy areas covered in striking red Blood Grass. Inhabited by Sand Sharks and Biter swarms.

View details →
Jellyshroom Cave
biomes

Jellyshroom Cave

An underground cavern system illuminated by giant, glowing purple mushrooms. Territory of the aggressive Crabsnake.

View details →
Kelp Forest
biomes

Kelp Forest

Dense forests of towering Creepvines. Home to Stalkers and a rich source of basic early-game materials.

View details →
Mountain Island
biomes

Mountain Island

A rocky, terrestrial island that breaks the surface, housing the massive alien Quarantine Enforcement Platform.

View details →
Mountains
biomes

Mountains

A steep underwater mountain range patrolled by Reapers, leading up to a large terrestrial island.

View details →
Mushroom Forest
biomes

Mushroom Forest

Dominated by massive tree-like fungal structures. A peaceful biome rich in vehicle fragments and Lithium.

View details →
Safe Shallows
biomes

Safe Shallows

The starting location. Features shallow waters, coral reefs, and abundant sunlight. Relatively safe from predators.

View details →
Sea Treader's Path
biomes

Sea Treader's Path

A dark, migratory trail worn into the seabed by the massive, three-legged Sea Treader Leviathans.

View details →
Sparse Reef
biomes

Sparse Reef

A relatively barren biome characterized by deep fissures and green waters. Contains valuable resources and very few predators.

View details →
Underwater Islands
biomes

Underwater Islands

Massive chunks of rock suspended in the water column by ancient Floaters. Infested with Bonesharks.

View details →

DANGEROUS

2
Blood Kelp Zone
biomes

Blood Kelp Zone

Deep, dark trenches filled with bioluminescent white and red Blood Vines. A highly unnerving environment.

DANGEROUS
View details →
Crash Zone
biomes

Crash Zone

The irradiated area surrounding the downed Aurora starship. Characterized by murky waters, scrap metal, and Reaper Leviathans.

DANGEROUS
View details →

DEEP

3
Inactive Lava Zone
biomes

Inactive Lava Zone

A sweltering cavern system of cooling magma and volcanic activity, patrolled by the Sea Dragon Leviathan.

DEEP
View details →
Lava Lakes
biomes

Lava Lakes

The deepest accessible biome. A massive cavern of active magma housing the Primary Containment Facility.

DEEPDANGEROUS
View details →
Lost River
biomes

Lost River

A massive, subterranean cave network filled with green, acidic brine pools and gargantuan ancient fossils.

DEEP
View details →