Grand Reef

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, adult 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=

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.