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Bioreactor (Subnautica)

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The Bioreactor is a Seabase module that composts organic matter into electrical energy. It provides a reliable power source for outposts in biomes with abundant flora and fauna, such as Kelp Forests.

Last refreshed May 18, 2026

Bioreactor (Subnautica)

Bioreactor

Category: Energy, Interior Pieces

Description

Composts organic matter into electrical energy.

Acquisition

Fragments

Bioreactor Fragment 1 Bioreactor Fragment 2 Bioreactor Fragment 3 Bioreactor Fragment 4

  • Item: Bioreactor Fragment
  • Location: Seabed, Grassy Plateaus, Wrecks, Kelp Forest, Sparse Reef
  • Quantity: 2 per fragment set

A reliable power source is a critical step toward self-sufficiency. Consider keeping a photo-journal of your achievements to motivate you in times of despair. ― PDA, Dialogue

Overview

The Bioreactor is constructed with the Habitat Builder and composts organic matter into Energy. It has a 4×4 inventory grid to place organic items into; items placed inside cannot be removed once inserted. It breaks down any organic matter into reliable energy for Seabases.

The Bioreactor produces 1 unit of energy every 1.2 seconds (50 units per minute), with a maximum capacity of 500 units per Bioreactor. It can only be placed in the centers of a Multipurpose Room or Large Room. It does not affect power in creative mode.

Bioreactors work well in biomes where organic matter is plentiful, such as Kelp Forests or Mushroom Forests, where Solar Panels may be less efficient. It is also easy to supply a Bioreactor with fuel if one keeps an Exterior Growbed, Interior Growbed, or Alien Containment full of fish nearby. It is also useful for disposing of any excess or spoiled flora and fauna that the player has no more need of.

Egg-hatched fish, in particular, provide the most energy.

Thanks to its low costs and easily renewable fuel, it is perfectly suited to power outposts with low-power devices like a [Battery Charger](/wiki/battery-charger) or Power Cell Charger, especially if the area lacks the requirements for both Solar Panels and Thermal Plants. But even if better sources are available, it still provides easy additional energy for demanding seabases.

Recipe

MaterialQuantity
Titanium2
Wiring Kit1
Lubricant1
Habitat Builder1

Energy Values

The following table lists the energy yield for various organic items when processed in a Bioreactor.

Flora & Samples

ItemEnergy Units
Acid Mushroom210
Acid Mushroom Spore21
Blood Oil420
Blue Palm Seed70
[Bulb Bush Sample](/wiki/bulb-bush-sample)420
Cave Bush Seed70
[Creepvine Sample](/wiki/creepvine-sample)210
Creepvine Seed Cluster70
Deep Shroom210
Deep Shroom Spore21
Eye Stalk Seed70
Furled Papyrus Seed70
Gabe's Feather Seed70
Gel Sack245
Spore Sack Seed7
Ghost Weed Seed70
Jellyshroom Spore140
Membrain Tree Seed70
Pygmy Fan Seed28
Redwort Seed70
Regress Shell Seed70
Rouge Cradle Seed70
Sea Crown Seed70
Spotted Dockleaf Seed70
Tiger Plant Seed70
Veined Nettle Seed21
Violet Beau Seed70
Writhing Weed Seed140
[Bulbo Tree Sample](/wiki/bulbo-tree-sample)420
Chinese Potato140
Fern Palm Seed70
Grub Basket Seed105
Jaffa Cup Seed140
Lantern Fruit210
Marblemelon420
Marblemelon Seeds70
Small Marblemelon280
Ming Plant Seed140
Pink Cap105
Pink Cap Spore14
Speckled Rattler140
Speckled Rattler Spore14
Voxel Shrub Seed28
[Coral Tube Sample](/wiki/coral-tube-sample)70
Fungal Sample70
Purple Brain Coral Sample70
Table Coral Sample70

Eggs

ItemEnergy Units
Shocker Egg259
Bone Shark Egg210
Crabsnake Egg231
Crabsquid Egg259
Crash Egg189
Cute Fish Egg210
Gasopod Egg231
Jellyray Egg119
Lava Lizard Egg189
Mesmer Egg175
Rabbit Ray Egg140
Reefback Egg280
Sand Shark Egg210
Shuttlebug Egg105
Spadefish Egg140
Stalker Egg105

Fauna

ItemEnergy Units
Ampeel770
Bladderfish210
Boneshark630
Boomerang280
Crabsnake700
Crabsquid770
Crashfish560
Eyeye420
Floater50
Garryfish420
Gasopod700
Holefish280
Hoopfish210
Hoverfish350
Jellyray350
Lava Lizard560
Lava Boomerang280
Mesmer560
Oculus630
Peeper210
Quillfish210
Razorfish210
Reefback280
Sand Shark210
Scuttler210
Shadow Leviathan Egg210
Shocker210
Skipjack210
Slimefruit210
Spinefish210
Stalker210
Striker210
Swashbuckler210
Tadfinch210
Urchin210
Veinback Ray210
Whiptail210
Wormhole210
Zebra Turtle210

(Note: The original source text was truncated at "Peeper". The list above includes all fully rendered entries from the provided body text.)

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