Leviathan Class Organisms

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Leviathan is a classification given to extremely large creatures of the Subnautica universe. Any fauna species large enough to lack natural predators can be classified as Leviathan; they need not be predatory. Although the term "Leviathan" is used to refer to a large mythical aquatic creature in the real world, there is no confirmation on whether the Leviathan classification is restricted to fauna in the Subnautica universe, or is simply the term used for any species of a sufficient size.

Relation to Other Leviathans

Leviathan is not part of a taxonomic classification so does not imply any of the species classified as such are related, at least despite their evolutionary status. In fact, the only two that appear to have any close current relation are the Sea Emperor Leviathan and Sea Dragon Leviathan who share several features including an almost identical body shape, seven identically positioned tentacles dotted with glowing spots, two forelimbs and a pair of light-producing organs atop their snouts. These two most likely shared a common ancestor that has since diverged into a "smaller", cave-dwelling predatory species and a larger, planktivorous species residing in the open ocean.

Another pair of Leviathans that seem to be related are the Shadow Leviathan and the Ice Worm. Both of which have elongated serpentine bodies lined with several parapodia, have large distinct blade-shaped heads, blackened skin, and feed with monstrous mandibles. This indicates that they had a common ancestor with a body plan much like that of a centipede crossed with a worm.

Leviathans of the Past

Despite being enormous when compared to the fauna of Earth, the leviathans inhabiting Planet 4546B in the present day are dwarfed by their predecessors; the three-million-year-old Gargantuan Fossil at full length is estimated to be 6-8 times longer than an adult Sea Emperor Leviathan specimen. To support a predator of such titanic proportions, many of the other creatures of that time period must have also been of colossal proportions.

The one-million-year-old Ancient Skeleton is enormous, with the gaps left by its missing teeth being large enough for Ryley Robinson to swim through comfortably. The exact size of this creature cannot be determined as the body form of the creature is extremely bizarre and it is unknown if the skeleton visible is the entire skeleton. What is available is around 100 meters in length, but it is also extremely bulky, giving it more body mass than anything alive on the planet today.

Even some non-leviathan fauna used to be huge enough to qualify. With the most notable being the one thousand-year-old Research Specimen Theta which out of all of the extinct Leviathans, was by far the smallest. Despite this, it is colossal in comparison to some of its modern relatives including the Biter and Sand Shark. It is recognized as being their ancestor as it has both the Biter's double eye sockets, while also having a tough armored shell like the Sand Shark. Unlike either of them, it actually possesses a pair of forearms which considering they were facing backwards were most likely a pair of flippers.

In order to support creatures of these magnitudes (if any are still alive currently in 4546B), it is mandatory for these creatures to reside tens (if not hundreds) of kilometers away from the Crater Edge for their space along with food supply to be satisfied enough for sustenance and survival. As well as this, they would have to feed on fully grown leviathans that feed on smaller leviathans or microscopic creatures (such as Adult Ghost Leviathans or other organisms of the same caliber as the latter).

Known Leviathan Class Organisms

The Crater

Sector Zero

The Squidshark is stated as "a leviathan-class predator at the smaller end of the scale" by its databank entry, though it is not included within the Leviathan tab in the databank.

Extinct Leviathan Class Organisms

Crater

Sector Zero

Size Comparisons

<tabber> Against Player=

  • Sea Treader (player below torso, in between legs)

    Sea Treader (player below torso, in between legs)

  • Reaper Leviathan (player above neck)

    Reaper Leviathan (player above neck)

  • Reefback Leviathan (player far in front of head)

    Reefback Leviathan (player far in front of head)

  • Ghost Leviathan adult (player above head sail)

    Ghost Leviathan adult (player above head sail)

  • Sea Dragon Leviathan (player in front of mouth)

    Sea Dragon Leviathan (player in front of mouth)

  • Ancient Skeleton (player in mouth)

    Ancient Skeleton (player in mouth)

  • Gargangtuan Fossil size compared to Ryley, Seamoth, Prawn Suit and Cyclops (comparison by user Jurandfantom)

    Gargangtuan Fossil size compared to Ryley, Seamoth, Prawn Suit and Cyclops (comparison by user Jurandfantom)

  • Chelicerate size comparison

    Chelicerate size comparison

  • Void Chelicerate size comparison

    Void Chelicerate size comparison

  • Glow Whale size comparison

    Glow Whale size comparison

  • Ice Worm size comparison

    Ice Worm size comparison

  • Shadow Leviathan size comparison

    Shadow Leviathan size comparison

  • Ventgarden size comparison (Player is tiny dot above the bell)

    Ventgarden size comparison (Player is tiny dot above the bell)

  • Juvenile Ventgarden size comparison

    Juvenile Ventgarden size comparison

|-| Against Other Creatures=

</tabber>

Trivia

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