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This article is about the Fauna in Subnautica. To see this subject's article on the Below Zero Wiki, click here.
This article is about Fauna. You may be looking for Flora.
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Fauna is the term for animals, in this case, the animals of Planet 4546B. Fauna in Subnautica can be found all over the planet, from the deep and dark depths of the secretive Lost River to the vibrant Safe Shallows, and even to the fiery pits of the Lava Lakes.

Fauna on Planet 4546B comes in all shapes and sizes, ranging from the tiny, cave-dwelling Rockgrub, to the colossal Sea Dragon Leviathan that spews molten minerals from its mouth. Fauna on Planet 4546B is capable of enduring and adapting to various environments , although unable to thrive due to the presence of the Kharaa Bacterium. Certain species of small fauna can sometimes be seen forming mostly noninteractive shoals. Fauna on 4546B also has yellow blood. The fact that the appearance of some species of the planet being similar to that of planet Earth species can be explained as a simple case of convergent evolution.

The player can scan Fauna with the Scanner, allowing them to view information about the creatures in their PDA.


Spoiler alert: The following section contains story related material.


Additional scans after unlocking the Data Bank Entry for that particular species of Fauna alert the player as to whether or not the specimen is infected with Kharaa, via the small screen protruding from the Scanner's left side.


Reproduction

Most known fauna species on Planet 4546B are simultaneous hermaphrodites, meaning that they have a single-sex capable of playing the role of either the male or female in reproduction and every individual being able to lay eggs and fertilize them. Two parents are still required to fertilize the eggs once laid, making it sexual reproduction. At least one fauna species is exempt from this and reproduces entirely asexually although the norm for the planet is sexual reproduction, as can be observed in all species that can be placed in an Alien Containment unit who will require two individuals of their species to produce eggs. The only species that does not reproduce is the Warper due to the fact they are artificial fauna.


Spoiler alert: The following section contains story related material.


The only one of the complex fauna species on the planet known to be an exception to this rule is the Sea Emperor Leviathan species, which is entirely asexual and does not require a mate. It is possible that the Sea Dragon Leviathan shares this method of reproduction as it is likely the closest living relative of the Sea Emperor Leviathan and was being studied by the Precursor Race in order to learn more about the Sea Emperor's reproduction.


All known complex species on 4546B reproduce via egg-laying.

Invertebrates make up the minority of fauna species within the crater on Planet 4546B, around 16.5%, contrasting with Earth on which invertebrates make up around 97% of fauna species.

List of Fauna

Carnivores

Fauna Name and ID Attitude Biome
Shocker Fauna
Ampeel

Shocker

Aggressive
Biter Fauna
Biter

Biter

Aggressive
Blighter Fauna
Blighter

Blighter 

Aggressive
Boneshark Fauna
Boneshark

Boneshark

Aggressive
Crabsnake Fauna
Crabsnake

Crabsnake

Aggressive
Crabsquid Fauna
Crabsquid

Crabsquid

Aggressive
Crash Fauna
Crashfish

Crash


Defensive

Lava Lizard Fauna A
Lava Lizard

lavalizard

Aggressive
Mesmer Fauna
Mesmer

mesmer

Aggressive

Spine Eel Fauna
River Prowler

spineeel

Aggressive
Sand Shark Fauna
Sand Shark

sandshark

Aggressive

Stalker Fauna
Stalker

stalker

Aggressive
Warper Fauna
Warper

warper



Herbivores

Fauna Name and ID Attitude Biome
Airsack Fauna
Bladderfish

bladderfish

Passive
Boomerang Fauna
Boomerang

boomerang

Passive
Red Ghost Ray Fauna
Crimson Ray

ghostrayred

Passive
Cute Fish Fauna
Cuddlefish

cutefish

Passive
Eyeye Fauna
Eyeye

eyeye

Passive
Garryfish Fauna
Garryfish

garryfish

Passive
Gasopod Fauna
Gasopod

gasopod 

Defensive
Ghost Ray Fauna
Ghostray

ghostrayblue

Passive
Holefish Fauna
Holefish

holefish

Passive
Hoopfish Fauna
Hoopfish

hoopfish

Passive
Hoverfish Fauna
Hoverfish

hoverfish

Passive
Jellyray Fauna
Jellyray

jellyray

Passive
Lavaboomerang
Magmarang

lavaboomerang

Passive
Oculus Fauna
Oculus

oculus

Passive
Peeper Fauna
Peeper

peeper 

Passive
Rabbit Ray Fauna
Rabbit Ray

rabbitray

Passive
Lava Eyeye
Red Eyeye

lavaeyeye

Passive
Reginald Fauna
Reginald

reginald

Passive
Skyray Fauna
Skyray

skyray

Passive
Spadefish Fauna
Spadefish

spadefish

Passive
Blood Hoopfish Fauna
Spinefish

spinefish

Passive



Scavengers & Parasites

Fauna Name and ID Attitude Biome
Amoeboid Fauna
Amoeboid
Passive

​​​​

Ancient Floater Fauna
Ancient Floater
Passive
Bleeder Fauna-0
Bleeder

bleeder

Aggressive
Blood Crawler Fauna
Blood Crawler

shuttlebug

Aggressive
Cave Crawler (01)
Cave Crawler

cavecrawler

Aggressive
Floater Fauna-0
Floater

floater

Passive
Lava Larva Fauna
Lava Larva

lavalarva

Passive
Rockgrub Fauna
Rockgrub

rockgrub

Passive
Jumper Fauna
Shuttlebug

jumper

Passive

Leviathans

Fauna Name and ID Attitude Biome
Ghost Leviathan Fauna
Ghost Leviathan 

ghostleviathan

Aggressive

Reaper Leviathan Fauna
Reaper Leviathan

reaperleviathan

Aggressive

Reefback Fauna
Reefback Leviathan

reefback

Passive
Sea Dragon Leviathan Fauna
Sea Dragon Leviathan

seadragon

Aggressive
Sea Emperor Fauna
Sea Emperor Leviathan
Passive
Sea Treader Fauna
Sea Treader Leviathan

seatreader

Defensive



Extinct Species

Name Location Of Remains Age Living Relatives
Unknown
Alpha Peeper Species
  • N/A
Tens if not hundreds of millions of years old
Unknown
Alpha Ray Species
  • N/A
Many millions of years old
Ancient Skeleton
Ancient Skeleton
1,000,000 years
  • Unknown
Gargantuan Skull
Gargantuan Fossil
3,000,000 years
  • Unknown
Disease Research Facility Skeleton
Research Specimen Theta
1000 years


Gallery

Trivia

  • As of the Dangerous Creatures update, all fauna have yellow blood. Before this update, all fauna had red blood. This is due to the ESRB giving Subnautica a higher rating than expected due to red blood.
    • Scientifically speaking, the fauna of planet 4546B might have high concentrations of vanabin in their blood.
  • Fauna were once intended to possess inherent attributes, that would have caused them to exhibit unique behaviors. These included, e.g., "Fertile" (occasionally lay eggs that can be hatched), "Alpha" (attacked the player if other creatures were killed by the player in the immediate vicinity), "Complex" (specimens take longer to scan), "Greater" (specimens are of larger size and weight). This however was scrapped upon the final release.
  • In the very early stages of Subnautica, there was many unused and cut fauna.
    • An unused creature named the Sandworm could only be found in the Entity Gallery. It was intended stay in one place under the ground, and when the player or an npc was right above it, it would spring up and would do 1 damage at a very fast rate. It only had animations for shooting out of the ground, going back into its hole, and an idle animation.
    • The unused Grabcrab creature would leave its burrow and search for items to drag back to its hole. These items included small resources, and even small fish. Its burrow also had the same model as the Grabcrab.
    • The Rock Puncher was a fauna that would have used its large appendages to smash terrain.
    • Unused clusters of Bloom Plankton can be spawned in the game, and react to light. They will glow red if a Flare is shining on them, and white if a Flashlight or Vehicle's light is shining on them.
    • In the Early Access Release trailer, the Large Bird can be seen flying among the Skyrays. They were cut entirely out of the game sometime before Early Access, making their appearance in the trailer the last time they were seen.

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