Biomes (Subnautica)

Subnautica features a wide range of biomes to explore and coexist with, representing miniature ecosystems.

Biomes

Surface Biomes

• Blood Kelp Zone (150m - 675m)
• Crash Zone (0m - 300m)
• Dunes (65m - 400m)
• Floater Island (Surface)
• Grand Reef (180m - 450m)
• Grassy Plateaus (50m - 170m)
• Kelp Forest (1m - 160m)
• Koosh Zone (140m - 480m)
• Mountain Island (Surface)
• Mountains (0m - 500m)
• Mushroom Forest (75m - 250m)
• Safe Shallows (1m - 80m)
• Sea Treader's Path (170m - 360m)
• Sparse Reef (40m - 310m)
• Underwater Islands (35m - 500m)

Cave Biomes

• Blood Kelp Caves (430m - 675m)
• Deep Grand Reef (425m - 600m)
• Jelly Shroom Caves (180m - 300m)
• Kelp Forest Caves (90m - 170m)
• Lava Caves (220m - 315m)
• Mountain Range Caves (0m - 380m)
• Mushroom Forest Caves (170m - 250m)
• Overgrown Caves (125m - 200m)
• Safe Shallows Caves (10m - 75m)
• Sea Treader's Tunnel Caves (200m - 340m)
• Tiger Plant Caves (120m - 175m)

In-development Biomes

• Active Lava Zone (1300m - 1700m)
• Inactive Lava Zone (600m - 1500m)
• Lilypad Islands
• Lost River (700m - 1000m)
• Twisty Bridges

Mini-Biomes

• Lava Geyser (variable depth)

Possible Biomes

• Arctic

Gallery

• 

  Arctic biome's reference sheet, made by the developers

• 

  Early development biome's reference sheet

• 

  Lost River's early map

• 

  Latest Subnautica map

• 

  Ditto, with more details

Trivia

• Developers' footages of biome generation can be seen on a playlist from Russel Maekim's Youtube channel. He also sometimes livestreams his work on Twitch.

• The game considers the inside of an Observatory, Lifepod, and Scanner Room to be separate biomes. This is also true for the Aurora and for some of the large wrecks in the Koosh Zone and Grassy Plateaus (respectively labelled crashedShip and wreck).