Reefback Leviathan

The Reefback is currently the largest passive life form in Subnautica, belonging to the fauna category. It dwells exclusively in the Grassy Plateaus, though they are planned to spawn in more open areas in the future

Appearance
The Reefback is massive in size, with most of the creature's body being comprised of a thick, purple carapace having a triangular front, and a relatively small body concentrated in the posterior. Attached to its main body are three long whip-like tentacles.

The carapace is patterned with slightly bright blue dotted pattern across towards the back, it also has many patches of teal coloured coral dotted across it, as well as some less prevalent, brown coral. Beneath its carapace, it is dark green with light blue bioluminescent stripes on the sides and in the middle. On either side of its body are eight yellow bioluminescent bulbs the purpose of these is unknown, though the data bank entry notes a visual similarity to the Gasopod algae gland. Two siphon-esque structures are located next to these bulbs.

Behavior
The Reefback drifts slowly and gently around the open waters of the Grassy Plateaus, mostly seen swimming in pods of more than two. It almost never adjusts its current altitude, unless bumped against obstacles.

The Reefback's unique trait comes from its ability to emit a wide range of echoing, low-frequency calls.

Flora
Reefbacks can support plantlife on their backs, they create a mini ecosystem by doing so, these species of flora can currently be found on Reefbacks:
 * Acid Mushroom
 * Furled Papyrus
 * Rouge Cradle
 * Regress Shell
 * Spotted Dockleaf
 * Tiger Plant
 * Writhing Weed
 * Veined Nettle
 * Violet Beau

Future Plans

 * Grasses will be added to the back of the Reefback as part of the mesh as well as slots for plants that will spawn randomly chosen and placed flora.
 * Small fish will follow Reefbacks, these will most likely be a combination of real fish and shoals
 * Barnacles that function similarly to Limestone Outcrops will be added to the back of Reefbacks.
 * Reefbacks will be added to more biomes in the future.

Gallery
For a more complete gallery, visit Reefback/Gallery.

Trivia

 * Reefbacks were initially intended to submerge themselves in sandy areas, mimicking patches of vegetation in order to hide from predators. Increased activity about them would've made them rise in search for quiter locals. It is unknown if this will ever be implemented.
 * Another intended interaction would've been that the player could grab ahold of the Reefback's tentacles to hitch a ride or hide on their plant-covered backs to hide from predators. It is unknown if this will ever be implemented.