Reefback Leviathan

The Reefback is currently the largest passive life form in Subnautica, belonging to the fauna category.

It is massive in size (see comparison with Seamoth in the gallery) and appears to drift gently in the waters around the Grassy Plateaus, mostly in pods of more than two.

Appearance
Most of the Reefback 's body is comprised of a thick, purple carapace with a triangular front and a relatively small body concentrated in the posterior. Attached to its body are three long whip-like tentacles.

The carapace is patterned with slightly bright blue dotted pattern across towards the back. 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 seven yellow bioluminescent eyes, with two siphon-esque structures seen next to them.

Behavior
The Reefback swims slowly and aimlessly around the Grassy Plateaus biome. It almost never adjusts its current altitude, unless it bumps against something.

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

Data Bank Entry
Armor plating on these huge lifeforms is thick enough to interfere with the spectroscope scanner. Limited data available.

Size ranges upwards of 20m. Tentacles provide low speed propulsion. Sociable, seen travelling in small pods. Profile consistent with a herbivore near the top of the food chain.

Predators: Unknown

Assessment: None at this time

Speculation
As seen in the concept art, it is possible that there would be an even bigger Reefback being able to shelter an entire unique ecosystem of coral reefs on its back in a future update.

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