Eggs

Eggs are items found in Subnautica. They are the unhatched versions of their respective Fauna. Until they hatch, the egg will be labeled as an unknown creature egg, changing to match the name of the creature the egg contained once it hatches. An egg can be identified by where it was found, its appearance, and its size (see table below).

Almost all Eggs can be placed inside an Alien Containment. After placing an egg inside an Alien Containment, it will stay where it was placed. After one to three in-game days, the egg will hatch into a smaller version of its respective species. The hatched creature will slowly grow, until it is mildly full sized or can fit to the confines of the Alien Containment. They can die inside of the aquarium however, if the aquarium's population limit is surpassed.

Baby creatures can be picked up and placed outside in the water, where they will instantly become fully grown. An aggressive creature will not attack the player if it is hatched in the aquarium, allowing the player to scan it even after it is released in the wild.

Eggs are also capable of being destroyed before they hatch. Hits with a knife will slice open the egg, resulting in no creature being spawned. Crashfish explosions can destroy their own eggs and habitat if they are too close. They can also be destroyed by a Prawn Suit with a single punch. Blasting an Egg using a Propulsion Cannon or Repulsion Cannon will result in their demise.

Eggs can be found in their species' respective Biomes, however, due to the game's physics in the game engine, an egg can roll into another biome or cave. An example of this is finding a Stalker egg in the Jellyshroom Cave.

Eggs can also be used as fuel for the Bioreactor, though they provide far less energy than a hatched creature.

More information and animations can be found on Trello.

Normal Eggs

Egg	Size	Description	Location	Energy Value	Incubation Period (Day/s)	Item ID
Ampeel egg	4 (2x2)	Ampeels hatch from these.	Blood Kelp Zone Bulb Zone	259	1	shockeregg
Boneshark egg	4 (2x2)	Bonesharks hatch from these.	Bulb Zone Mushroom Forest Underwater Islands	210	1	bonesharkegg
Crabsnake egg	4 (2x2)	Crabsnakes hatch from these.	Jellyshroom Cave, inside Jellyshroom	231	1	crabsnakeegg
Crabsquid egg	4 (2x2)	Crabsquid hatch from these.	Northern Blood Kelp Zone Deep Grand Reef	259	1	crabsquidegg
Crashfish egg	1	Crashfish hatch from these.	Kelp Forest Caves Safe Shallows Safe Shallows Caves	189	1	crashegg
Cuddlefish egg	1	Cuddlefish hatch from these.	Lost River Laboratory Deep Grand Reef Degasi Base Dunes Sinkhole Northeastern Mushroom Forest Caves Northwestern Mushroom Forest Caves	210	1	cutefishegg
Gasopod egg	4 (2x2)	Gasopods hatch from these.	Crash Zone Mesas Dunes Safe Shallows	231	1	gasopodegg
Jellyray egg	4 (2x2)	Jellyrays hatch from these.	Deep Grand Reef Mushroom Forest Mushroom Forest Caves	119	1	jellyrayegg
Lava Lizard egg	4 (2x2)	Lava Lizards hatch from these.	Lava Castle	189	1	lavalizardegg
Mesmer egg	1	Mesmers hatch from these.	Bulb Zone Caves Lost River	175	1	mesmeregg
Rabbit Ray egg	1	Rabbit Rays hatch from these.	Safe Shallows	140	1	rabbitrayegg
Reefback Leviathan egg	9 (3x3)	Incredibly, Reefback Leviathans hatch from these.	Not currently implemented	280	3	reefbackegg
Sand Shark egg	4 (2x2)	Sand sharks hatch from these.	Grassy Plateaus	210	1	sandsharkegg
Shuttlebug egg	1	Shuttlebugs hatch from these.	Not currently implemented	105	1	jumperegg
Spadefish egg	1	Spadefish hatch from these.	Deep Sparse Reef Grassy Plateaus Caves Underwater Islands Underwater Islands Caves	140	1	spadefishegg
Stalker egg	4 (2x2)	Stalkers hatch from these.	Kelp Forest	105	1	stalkeregg

Unique Eggs

Spoiler alert: The following section contains story related material.
Location

Data Bank Entry

<tabber> Alien Eggs=

Evidence suggests that a substantial number, if not all of the local species reproduce through egg-laying. Eggs can be found resting on the seafloor, buried beneath detritus, or even wedged into cracks in the rock.

Different species likely favor different biomes as their nesting grounds. Eggs discovered in the wild are in some form of natural stasis, likely awaiting ideal conditions in which to hatch, or the delivery of some vital enzyme which will kick start the process.

It is impossible to calculate the species of the egg from the exterior, however it may be possible to stimulate a hatching response if an egg is relocated to a suitable alien containment unit.

</tabber>

Gallery

<tabber> In Game View=

A Lava Lizard Egg in the Lava Castle
A Jellyray Egg in the Mushroom Forest
A Gasopod Egg in the Safe Shallows
A Crashfish Egg in its habitat
A Crabsquid Egg in the Deep Grand Reef
A Crabsnake Egg in a Jellyshroom
A Boneshark Egg in the Mushroom Forest
An Ampeel Egg in the Bulb Zone
A Mesmer Egg
A Rabbit Ray Egg in the Safe Shallows
A Sand Shark Egg in the Grassy Plateaus
A Spadefish Egg in an Alien Containment
A Stalker Egg amongst Creepvines in the Kelp Forest
A Sea Emperor Leviathan Egg in the Primary Containment Facility Aquarium
The Sea Dragon Leviathan Egg in the Disease Research Facility
A Cuddlefish egg
A few Eggs in the Primary Containment Facility.

|-| Normal Eggs=

Ampeel Egg
Boneshark Egg
Crabsnake Egg
Crabsquid Egg
Crashfish Egg
Cuddlefish Egg
Gasopod Egg
Jellyray Egg
Lava Lizard Egg
Mesmer Egg
Rabbit Ray Egg
Sand Shark Egg
Shuttlebug Egg
Spadefish or Reefback Leviathan Egg
Stalker Egg

|-| Unique Eggs=

Sea Dragon Leviathan Egg seen on Sketchfab
Sea Emperor Leviathan Egg

|-| Other=

Creature Eggs from Trello, day time
Creature Eggs from Trello, night time
Concept Art
An early model of the Sea Emperor Leviathan Egg seen on Sketchfab.
A list of creature Eggs, taken from the official Subnautica Twitter feed.
More Eggs

</tabber>

Trivia

The bulbs of the Giant Cove Tree in the Lost River are actually Ghost Leviathan Eggs, but can't be interacted with.
Sea Dragon Leviathan Eggs used to share the same model of the Crabsquid Egg.