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. Most normally aggressive creatures will not attack the player if hatched in the aquarium, allowing the player to scan it even after it is released in the wild. An exception is the Ampeel, as its electric shocks still apply damage, and the Crabsquid.
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.
|Egg||Size||Description||Location||Energy Value||Incubation Period (Day/s)||Item ID|
|Ampeel egg||4 (2x2)||Ampeels hatch from these.||259||1||shockeregg|
|Boneshark egg||4 (2x2)||Bonesharks hatch from these.||210||1||bonesharkegg|
|Crabsnake egg||4 (2x2)||Crabsnakes hatch from these.||231||1||crabsnakeegg|
|Crabsquid egg||4 (2x2)||Crabsquid hatch from these.||259||1||crabsquidegg|
|Crashfish egg||1||Crashfish hatch from these.||189||1||crashegg|
|Cuddlefish egg||1||Cuddlefish hatch from these.||210||1||cutefishegg|
|Gasopod egg||4 (2x2)||Gasopods hatch from these.||231||1||gasopodegg|
|Jellyray egg||4 (2x2)||Jellyrays hatch from these.||119||1||jellyrayegg|
|Lava Lizard egg||4 (2x2)||Lava Lizards hatch from these.||189||1||lavalizardegg|
|Mesmer egg||1||Mesmers hatch from these.||175||1||mesmeregg|
|Rabbit Ray egg||1||Rabbit Rays hatch from these.||140||1||rabbitrayegg|
|Reefback Leviathan egg||9 (3x3)||Incredibly, Reefback Leviathans hatch from these.||
|Sand Shark egg||4 (2x2)||Sand sharks hatch from these.||210||1||sandsharkegg|
|Shuttlebug egg||1||Shuttlebugs hatch from these.||
|Spadefish egg||1||Spadefish hatch from these.||140||1||spadefishegg|
|Stalker egg||4 (2x2)||Stalkers hatch from these.||105||1||stalkeregg|
Spoiler alert: The following section contains story related material.
These eggs are unobtainable.
Data Bank Entry
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.