The Crater

A topographical scan of The Crater by Ryley Robinson's PDA.

**The Crater** is the area in which the main story of Subnautica takes place. The Crater and Sector Zero are the two major ecosystem centres known on Planet 4546B.

## Geological Information

The area is the crater of a huge, long-dormant undersea volcano approximately three kilometres in height and varies from 3.3 to 4.3 kilometres in diameter. After the volcano became dormant the crater was filled in by sediments and the once volatile volcano became the centre of a diverse and thriving ecosystem.

The area is likely a guyot; a type of undersea volcanic formation that once protruded above the surface and has now been eroded into a tabletop below the ocean's surface.

The area around the volcano is known as the dead zone or crater edge. It is a vast expanse of featureless water inhabited only by plankton and their planktivorous Leviathan class predators. It is unknown how large this stretch of ocean is.

Within the crater are multiple ecological Biomes. Each is diverse in its very own way. Biomes range from Underwater Islands to Kelp Forests, each supporting their own unique Fauna and Flora.

## Features

* Fauna
* Flora
* Architect Installations
* Biomes

* Ampeel
* Biter
	+ Blighter
* Boneshark
* Crabsnake
* Crabsquid
* Crashfish
* Lava Lizard
* Mesmer
* River Prowler
* Sand Shark
* Stalker
* Warper
* Bladderfish
* Boomerang
	+ Magmarang
* Cuddlefish
* Eyeye
* Red Eyeye
* Garryfish
* Gasopod
* Ghost Ray
	+ Crimson Ray
* Holefish
* Hoopfish
	+ Spinefish
* Hoverfish
* Jellyray
* Oculus
* Peeper
* Rabbit Ray
* Reginald
* Skyray
* Spadefish
* Amoeboid
* Bleeder
* Cave Crawler
	+ Blood Crawler
* Floater
	+ Ancient Floater
* Lava Larva
* Rockgrub
* Shuttlebug
* Ghost Leviathan
	+ Ghost Leviathan Juvenile
* Reaper Leviathan
* Reefback Leviathan
	+ Reefback Leviathan Juvenile
* Sea Dragon Leviathan
* Sea Emperor Leviathan
	+ Sea Emperor Leviathan Juvenile
		- Sea Emperor Leviathan Baby
* Sea Treader Leviathan

- Acid Mushroom
	* Deep Shroom

- Blood Kelp
	* Bloodroot

- Blue Palm

- Bulb Bush

- Bulbo Tree

- Cave Bush

- Chinese Potato Plant

- Creepvine

- Eye Stalk

- Fern Palm

- Furled Papyrus

- Gabe's Feather

- Gel Sack

- Ghost Weed

- Grub Basket

- Jaffa Cup

- Jellyshroom

- Lantern Tree

- Marblemelon Plant

- Membrain Tree

- Ming Plant

- Pink Cap

- Purple Pinecone

- Pygmy Fan

- Redwort

- Regress Shell

- Rouge Cradle

- Sea Crown

- Speckled Rattler

- Spiked Horn Grass

- Spotted Dockleaf

- Sulfur Plant

- Tiger Plant

- Veined Nettle

- Violet Beau

- Voxel Shrub

- Writhing Weed

- Anchor Pods

- Blood Grass

- Brine Lily

- Crab Claw Kelp

- Drooping Stingers

- Giant Cove Tree

- Tree Leech

- Quarantine Enforcement Platform

- Disease Research Facility

- Alien Thermal Plant

- Primary Containment Facility

- Bulb Zone Arch

- Crag Field Arch

- Floating Island Arch

- Ghost Forest Arch

- Mountain Island Arch

- Mushroom Forest Arch

- Blood Kelp Zone Sanctuary Cache

- Deep Sparse Reef Sanctuary Cache

- Dunes Sanctuary Cache

- Lost River Laboratory Cache

- Northern Blood Kelp Zone
	* Blood Kelp Trench

- Bulb Zone

- Crag Field

- Crash Zone

- Crater Edge

- Dunes

- Grand Reef
	* Deep Grand Reef

- Grassy Plateaus

- Kelp Forest

- Mountains

- Northwestern Mushroom Forest
	* Northeastern Mushroom Forest

- Safe Shallows

- Sea Treader's Path

- Sparse Reef
	* Deep Sparse Reef

- Underwater Islands

- Floating Island

- Mountain Island

- Inactive Lava Zone
	* Lava Lakes

- Jellyshroom Cave

- Lost River

## Trivia

* Although the size of the Crater is stated to be 2km x 2km in the Crater Edge Databank entry, the actual size in game is about twice that.

* Before the Big Little Update, the Crater used to have more realistic terrain at around 3000 meters depth surrounding it, giving an appearance similar to real world abyssal plains. The bottom of the Crater was found here, which was a relatively flat area that covered a 4km x 4km square. At 3040 meters depth, the world completely cut off and all terrain would cease. It is unknown why this terrain was removed.

## References

1. ↑ https://www.youtube.com/watch?v=ivNIbotnHsU *Dated August 9, 2018.*
2. ↑ https://unknownworlds.com/subnautica/subnautica-big-little-update-released/ *Dated December 11, 2019.*

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