The Crater

The crater is the area in which the main story of Subnautica takes place. The Crater and the Arctic mega biome are the two major ecosystem centers known on Planet 4546B.

The area is the crater of a huge, long-dormant undersea volcano approximately three kilometers in height and two kilometers in diameter. After the volcano became dormant the crater was filled in by sediments and the once volatile volcano became the center of a diverse and thriving ecosystem.

The area around the volcano is known as the dead zone or crater edge. It is a barren expanse of empty water inhabited only by plankton and planktivorous Leviathans.

Biomes
The crater houses a wide range of distinct ecological biomes from the verdant Kelp Forests to the desolate Inactive Lava Zone.


 * Blood Kelp Zones
 * Bulb Zone
 * Crag Field
 * Crash Zone (unnatural; created by the crash of the Aurora)
 * Dunes
 * Grand Reef
 * Grassy Plateaus
 * Kelp Forest
 * Mountains
 * Mushroom Forests
 * Safe Shallows
 * Sea Treader's Path
 * Sparse Reef
 * Underwater Islands
 * Floating Island
 * Mountain Island
 * Deep Grand Reef
 * Inactive Lava Zone
 * Jellyshroom Cave
 * Lava Lakes
 * Lost River