Eggs

Eggs are the unhatched forms of certain types of Fauna. Until they hatch, the egg will be labeled as an unknown creature egg, changing to match the name of the creature the egg contains once it hatches. An egg can be identified by where it was found, its appearance, and its size (See table below).

Eggs can be placed inside an Alien Containment. After placing an egg inside an Aquarium, it will stay where it was placed. After one to three in-game days, the egg will hatch into a smaller version of its species. The hatched creature will slowly grow until it is mildly full sized or can fit in the Alien Containment. They can die inside of the aquarium however, if left unattended for too long.

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. However, if it is released outside, it will revert to its aggressive behavior.

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.

Eggs can be found in their species' respective Biomes, however, an egg might fall into a Cave or another biome.

More information and animations can be found on Trello.

Eggs

Icon	Name	Size	Location	Incubation Period (Day/s)
	Mesmer Egg	1	Koosh Zone	1
	Spadefish Egg	1	Grassy Plateaus	1
	Rabbit Ray Egg	1	Safe Shallows	1
	Shuttlebug Egg	1	Koosh Zone	1
	Bone Shark Egg	4 (2x2)	Koosh Zone Mushroom Forest	1
	Crabsnake Egg	4 (2x2)	Jelly Shroom Caves	1
	Gasopod Egg	4 (2x2)	Safe Shallows	1
	Jellyray Egg	4 (2x2)	Mushroom Forest Deep Grand Reef	1
	Sand Shark Egg	4 (2x2)	Grassy Plateaus	1
	Ampeel Egg	4 (2x2)	Blood Kelp Zone Koosh Zone	1
	Stalker Egg	4 (2x2)	Kelp Forest	1
	Reefback Egg	9 (3x3)	Grassy Plateaus	3
	Crash Egg	1	Unimplemented

It is worth noting that many Eggs are affected by the in-game physics engine, and as such will roll into strange places. An example of this is finding a Stalker or Sand Shark egg in the Jelly Shroom Caves.

Gallery

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  Rabbit Ray egg render

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  Crab Snake or Shuttlebug egg render

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  Spadefish or Reefback egg render

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  Sand Shark egg render

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  Mesmer egg render

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  Gasopod egg render

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  Bone Shark egg render

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  Ampeel egg render

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  Stalker egg render

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  Jellyray egg render

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  Creatures Eggs from Trello, day time

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  Creatures Eggs from Trello, night time

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  A list of possible creature eggs, taken from the official Subnautica twitter feed

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  Concept Art

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  An early picture of a Crashfish egg, seen on Sketchfab.

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  An early model of a Cute Fish egg from Sketchfab.

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  An early model of a Sea Emperor egg seen on Sketchfab.

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  An early model of an Crabsquid egg, seen on Sketchfab.