Grand Reef

This article is about the Grand Reef. You may be looking for the Deep Grand Reef, the Grand Reef Caves, or the Sea Treader's Path.

Read at own risk This article contains unmarked spoilers. Players new to the game would want to avoid or be cautious toward this article.

This seems new This article contains information that is updated for the latest Experimental Version of Subnautica. Players using stable mode may find this information inaccurate.

Grand Reef
Tab	Biomes
Type	Surface
Depth Range	150 - 480 meters
Temperature Range	13.5°C-16.1°C
Biome ID	grandreef smokers
Harvesting Nodes	Basalt Outcrop
Coordinates	-877 -340 -1175
Point of Interest	Large Wrecks -284 -250 -850 -865 -430 -1420 Thermal Vent -495 -400 -1250 -460 -380 -1240 -975 -410 -1380 -380 -215 -745 -435 -360 -1250 Alien Pipe Entrance Point -940 -335 -1220

The Grand Reef is a unique deep biome in Subnautica that covers between the southwestern and southern portions of the map.

Description

The Grand Reef is home to many types of fauna, including the large herbivorous Sea Treader and also two Ghost Leviathans. It is also known for its unique types of flora, from the luminous Floating Stones to the peculiar Membrain Trees. It also features its own cave system, the Grand Reef Caves.

Below this area, the player can find a large cavern system featuring the similar types of flora and fauna, with the addition of Crabsquids and Jellyrays and the absence of the Sea Treader. Above the Grand Reef is the Floating Island, which occasionally casts a large dominating shadow on the seabed.

Commonly found harvesting nodes in the Grand Reef are basalt outcrops, as well as many other types of rare crystals.

An Alien Pipe Entrance Point is found in the Grand Reef.

Scattered deep within the Grand Reef are five hydrothermal vents.

• Resources
• Fauna
• Flora

• Aluminum Oxide Crystal
• Diamond
• Gold
• Large Copper Deposit
• Large Lead Deposit
• Large Quartz Deposit
• Large Salt Deposit
• Membrain Tree Seed
• Mercury Ore
• Quartz
• Uraninite Crystal

Bladderfish

Boomerang

Eyeye

Ghost Leviathan

Hoopfish

Peeper

Reginald

Sea Treader

Shoal of Fish

Spadefish

Warper

Floating Stones

Membrain Tree

Gallery

• Screenshots
• Concept Art

Overview, day

Overview, night

Flora found in the Grand Reef

A shallower area of the Grand Reef

One of the smaller rock arches in the Grand Reef

A large rock arch in the Grand Reef

A deeper area of the Grand Reef

Thermal Vents in the Grand Reef

An entrance to the Grand Reef Caves

Concept Art

For a more complete gallery, visit Grand Reef/Gallery.

Trivia

• In earlier builds, the Grand Reef had large pillar-like spikes, some of which were visible above the surface. These were removed, and was explained to be temporary. However, the concept of them may have been used for inspiration of the Crag Field. Another reason for their removal is that they had bad models and were not destructible.
• Certain structures have curious house-like caverns, very reminiscent of grotto-homes in primitive cultures. 
• The Grand Reef is the third biggest biome in Subnautica.
• The Grand Reef was planned to house a Warp Gate Cache that linked to the Primary Containment Facility. This however, was scrapped.