On the survival side of Subnautica: Below Zero’s gameplay, players can thrive in the icy landscape with the right tools. Among those tools is the very fauna of Sector Zero, namely in the form of eggs — here’s a small rundown of Below Zero’s creature eggs and what you can get out of them.

How to Use Eggs

In order to actually use a creature egg, players will need to place them in an Alien Containment tank. This blueprint can be found and scanned in the bow of the Mercury II wreckage. It’ll take five glass and two titanium to craft, and you’ll have to build a Hatch to actually access it (which takes one quartz and titanium to make).

Once placed inside the aquarium, an egg will hatch after some time has passed in-game. The length of time depends on the creature, and these creatures can provide a variety of benefits. All of them can be scanned for data (especially if a fish is naturally hostile) or used as biofuel. Some can be used to farm resources, and some can even be used as pets.

Arctic Ray

  • Location: Arctic Rays can be found throughout numerous biomes in the game. However, their eggs can only be found in the Sparse Arctic, the general starting area. Time To Hatch: 1 day Uses: The fish do not provide any byproducts and are inedible, though they can be used as biofuel, producing up to 420 energy. The egg itself produces roughly 189 energy.

Brinewing

  • Location: Brinewings can generally be found anywhere they can safely hunt, under icebergs. Normally, this places them in the Sparse Arctic and nearby biomes, where they can attack Robin with their icy saline solution (it will not hurt players, but leave them immobilized and at risk for oxygen depletion). Likewise, their eggs can also be found in these areas, usually stuck to the underside of said icebergs. Time To Hatch: 1 day. Uses: Brinewings cannot be eaten, nor do they produce byproducts. Hatching them mainly provides a safe environment to scan them without getting frozen. They can also be used for biofuel, with eggs producing 105 energy, and the fish produce 280.

Brute Shark

  • Location: This hostile fish can be found anywhere from the Twisty Bridges, Lilypad Islands, Thermal Spires, and beyond. However, their eggs are primarily located in the caves of the Twisty Bridges. Time to Hatch: 1.5 days Uses: Hatching a Brute Shark egg can provide a safe environment to scan them. Outside of this, however, their next use is biofuel. Their eggs provide 231 energy, and the sharks provide 630.

Crashfish

  • Location: The Crashfish and its beloved Sulfur Plant can be found in almost every underwater biome of Sector Zero, though they’re quite particular to the Kelp Forests and their caves. Their eggs have a chance of spawning in any of these plants, after said fish has exploded. Time to Hatch: 1 day Uses: Hatching Crashfish, like the first Subnautica, can provide players with their own supply of Crystalline Sulfur. Outside of this, they can be used as biofuel for 560 energy, with their eggs producing 189.

Cryptosuchus

  • Location: Cryptosuchus can mainly be found in the Purple Vents and Thermal Spires biomes. Their eggs, however, can be found only in the latter region, inside its cave systems. Time to Hatch: 2 days Uses: Hatching a Cryptosuchus can allow players to safely scan them. Outside of this, the eggs produce 259 biofuel energy, and the fish itself gives 700.

Glow Whale

  • Location: The Glow Whale is the only Leviathan of Below Zero to have an egg. It’s also the only Leviathan to have an egg that can hatch in containment. These gentle giants can be found in the East Arctic and Lilypad Islands, and their eggs can be found in the latter biome’s caves. Time to Hatch: 2 days Uses: These Leviathans and their eggs have no major purpose outside of biofuel. Said eggs can produce 280 energy, and the whales, 840.

Eye Jelly

  • Location: These electric, myopic jellyfish can be found in the westernmost biomes of Sector Zero: the West Arctic, Glacial Bay, and Glacial Connection. Their eggs can also be found in the Glacial Connection. Time to Hatch: 1 day Uses: Their eggs can be used as biofuel to produce 119 energy. The fish themselves can make 630 energy.

Lily Paddler

  • Location: As the name suggests, these fish can mainly be found in the Lilypad Islands, as can their eggs — specifically in the Crevice. Time to Hatch: 1 day Uses: Hatching them can allow players to safely scan this fauna, without risk of being hypnotized, disoriented, and drowning. Of course, there is always the option to use them for biofuel. Unhatched eggs will produce 231 energy, while the actual Paddlers give 560 energy.

Pengwing

  • Location: These birds can be found in every biome that has a surface to it, be it icebergs or solid land. Said eggs, however, are only found in three biomes: the Kelp Forests, and the East and West Arctic. Time to Hatch: 1 day Uses: Outside of their adorable appearance, they have no major use outside biofuel. Eggs provide 119 energy, grown Pengwings provide 560, and even Penglings can give 210 energy.

Pinnacarid

  • Location: These semi-amphibious fish can be found in the East and West Arctic regions, alongside the Kelp Forests. Their eggs, however, can only be found in the latter biome. Time to Hatch: 1 day Uses: Like most other creatures on this list, they have no real purpose outside of biofuel. The eggs can produce 189 energy, and the fish can give 420 energy.

Rock Puncher

  • Location: Originally designed for the first game and repurposed for Below Zero, Rock Punchers make their homes in the Thermal Spires, Koppa Mining Site, and Crystal Caves. Their eggs, likewise, can be found in the latter two biomes. Time to Hatch: 1 day Uses: They’re somewhat hostile, so finding and hatching said eggs will provide a safe method to scan them. Outside of that, they make for decent biofuel, as the fish provides 700 energy, and their eggs 245.

Sea Monkey

  • Location: These critters can be found throughout the Lilypad Islands and Kelp Forest biomes. Their nests will be located in the caves of these areas, and there’s a small chance their eggs will spawn inside them. Time to Hatch: 1 day Uses: If allowed to fully grow, they’ll proceed to gift players with random resource chunks, as they do in the wild. Of course, they can still be used as biofuel, with eggs producing 210 energy, babies producing 210, and adults 560.

Squid Shark

  • Location: Squid Sharks are another hostile fauna, located in the Deep Twisty Bridges and Lilypad Islands. Their eggs can only be found in the lattermost region, in the Deep Lilypads Cave. Time to Hatch: 2 days Uses: Given their hostile nature, hatching the eggs provide a safe alternative for scanning. Or, if used for biofuel, they can provide 259 energy. The sharks, themselves, provide 700 energy.

Titan Holefish

  • Location: Titan Holefish can be found in the East, West, and Sparse Arctic. Their eggs can be found only in the former two regions, hidden inside the numerous icebergs of the biomes. Time to Hatch: 1.5 days Uses: Once grown, they can be used to replenish oxygen. But, given the nature of containment tanks and bases, said use becomes obsolete. Like all other eggs and fish, they can offer 259 and 770 energy, respectively.

Trivalve

  • Location: Trivalves cannot be encountered in the wild, and their few eggs are spread thin throughout the world. Blue Trivalves can be found in icebergs in the West Arctic and caves in the Arctic Spires. Yellow Trivalves are only found in the Deep Lilypads Cave. Time to Hatch: 1 day Uses: Their eggs can be used to produce 210 energy. But once hatched, Trivalves can’t be used as biofuel. This is due to their nature as the Below Zero equivalent to the Cuddlefish. Instead of a power source, this fish can be an extremely sociable and interactive pet to players.