Grand Reef

This article is about the Grand Reef. If this is not what you are looking for, see Grand Reef (Disambiguation).

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	Limestone Outcrop Sandstone Outcrop Shale Outcrop
Point of Interest	Large Wrecks -284 -250 -850 -865 -430 -1420 Thermal Vent Clusters -375 -203 -729 -979 -393 -1372 -447 -350 -1264 Story Spoiler Alien Vent Entrance Point -940 -335 -1220

The Grand Reef is a deep biome in Subnautica which covers a large area in the southern portion of The Crater.

Description

The Grand Reef is home to many types of fauna, including the large bottom-dwelling Sea Treader Leviathans, as well as two enormous Ghost Leviathans. It is also known for its unique types of flora, from the many luminous Anchor Pods to the peculiar Membrain Trees. There are many entrances to small caves known as the Grand Reef Caves in the Grand Reef. Scattered deep within the Grand Reef are multiple hydrothermal vents.

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 Leviathans.

Rubies and Gel Sacks are commonly found in the Grand Reef, along with many other types of rare crystals.

Spoiler alert: The following section contains story related material.
One of the five Sea Emperor Juveniles can be found here after the Sea Emperor Leviathan Eggs have been hatched.

• Resources
• Fauna
• Flora
• Fragments

• Copper Ore
• Diamond
• Gel Sack
• Gel Sack Spore
• Gold
• Large Copper Deposit
• Large Quartz Deposit
• Lead
• Lithium
• Membrain Tree Seed
• Quartz
• Ruby
• Silver Ore
• Spadefish Egg
• Titanium
• Uraninite Crystal

Bladderfish

Eyeye

Ghost Leviathan

Hoopfish

Peeper

Sea Treader Leviathan

Shoal of Fish

Spadefish

Warper

Anchor Pods

Gel Sack

Membrain Tree

Moonpool

Thermal Plant

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

A Wreck located in a shallower area of the Grand Reef

A Wreck located in a deeper area of the Grand Reef

Sea Treader Leviathans in the Grand Reef

A small canyon in the Grand Reef

A large canyon, leading to an entrance to the Deep Grand Reef

A large opening into the Deep Grand Reef

A small opening into the Deep Grand Reef

The Ghost Leviathan located in the western area of the biome

The Ghost Leviathan located in the eastern area of the biome

Transition with the Crag Field

Transition with the Kelp Forest

Transition with the Sparse Reef

Transition with the Sea Treader's Path

Large spikes present in early versions of the Grand Reef

Large crystals present in early versions of the Grand Reef

Concept art

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.
• There are actually only 3 types of Flora in the Grand Reef: Anchor Pods, Gel sacks, and Membrain Trees.

Spoiler alert: The following section contains story related material.
The Grand Reef was planned to house a Warp Gate Cache that linked to the Primary Containment Facility. This, however, was scrapped.