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BioMods
May 22, 2026 at 07:21 AM
Reframed BioMods as temporary perks and distinguished them from Adaptations
BioMods are temporary, reversible perks in Subnautica 2, distinct from Adaptations. Where Adaptations are permanent DNA upgrades drawn from Angel Comb bulbs that enter the player's genome and gate progression, BioMods are optional survival and mobility abilities that the player equips and unequips freely. A BioMod does not change the player's genome: it can be swapped out at any time, which is the core difference between the two systems. BioMods are managed at a Bio Lab base module.
It is easy to confuse the two body-modification systems, so the distinction is worth stating plainly. Community materials from before launch sometimes used the term bio-mods loosely for both, but in the current Early Access build they are separate.
Property | BioMods | Adaptations |
|---|---|---|
Permanence | Temporary and reversible; can be equipped and removed at will. | Permanent; enter the genome and cannot be undone. |
Source | Built from creature DNA collected with the Biosampler, then processed at a Bio Lab. | Granted by the colored bulbs of Angel Comb growths, consumed on use. |
Role | Optional perks for mobility, defense, and resource management. | Gate major progression, such as deeper diving and passing the heat barrier. |
BioMods are obtained and equipped through a three-stage pipeline. First, the player collects DNA from the moon's creatures using the Biosampler. Next, that genetic material is taken to a Bio Lab, the base module where BioMods are managed and equipped. Finally, BioMods are produced and slotted using a Gene Augmentation Station. The full chain is: Biosampler, then Bio Lab, then Gene Augmentation Station.
Because the whole loop runs through built base modules and a handheld sampler, none of it permanently rewrites the player's biology. That is the line that separates BioMods from Adaptations: an Adaptation, once taken from an Angel Comb bulb, is consumed and locked into the genome, whereas a BioMod sits in an equipment slot and can be changed whenever the player visits a Bio Lab.
In the current Early Access build, the player has one active BioMod slot and up to six passive BioMod slots. Most of the passive slots are locked at first and open up over time, and additional passive slots are planned to arrive in a later update, so the number of perks a player can run at once grows across a playthrough. The exact slot figures here reflect the current build and may change as the game develops. See the Early Access and Development Roadmap for the planned slot expansion.
BioMods come in two kinds, and the slot type matches the kind:
Active BioMods are triggered manually, for example a Dash burst of speed, and go in the active slot.
Passive BioMods trigger automatically by reflex once equipped, for example a Sea Skimmer speed boost near surfaces, and go in the passive slots.
A few BioMods are available from early on, unlocked the first time the player interacts with a Bio Lab near the opening Lifepod. The rest are tied to specific creatures and cannot be claimed by an ordinary scan. Scanning a creature with the standard Scanner adds a Databank entry but does not grant its BioMod. To unlock the creature-linked BioMods, the player first needs a Bioscanner attachment that fits onto the regular Scanner; with it equipped, sampling the right creature unlocks the BioMod that creature is tied to.
Because the Bioscanner is recovered relatively late, deeper in the world near the alien ruins, most of the creature-linked BioMods only become available in the back half of a playthrough. The starter BioMods carry most of the early game, so the player is not locked out of progress before the Bioscanner is in hand.
Active BioMods are used on demand and share a cooldown. The set below appears in the current Early Access build.
BioMod | Effect | How to Unlock |
|---|---|---|
Dash | A short directional burst of speed used to dodge predators or close gaps, on a short cooldown. | Starter, granted at the first Bio Lab. |
Pathfinder | Leaves a glowing pheromone trail behind the player that can be followed back out of caves, trenches, and large wrecks. | Starter, granted at the first Bio Lab. |
Sonic Echo | Emits a pulse that highlights nearby mineral resources within a radius, useful for spotting ore while gathering. | Bio-sample a Collector Leviathan. |
Electric Discharge | Releases a shock in a wide area around the player that deters most medium and large predators. | Bio-sample an electric eel-type creature. |
Chum Cloud | Releases a cloud of bait that pulls nearby predators away for a few seconds, similar to throwing a flare. | Bio-sample a toxic-sponge or scavenger creature. |
Electric Discharge covers the whole area around the player rather than a single direction, which makes it a reliable panic button, though it does not deter every species (Hammerheads, for example, appear to be unaffected). Chum Cloud has to be aimed and has a longer cooldown, so it is more situational.
Passive BioMods stay active once equipped and trigger by reflex without input. The set below appears in the current Early Access build.
BioMod | Effect | How to Unlock |
|---|---|---|
Sea Skimmer | Increases swim speed when the player is close to the seafloor or another surface. | Starter, granted at the first Bio Lab. |
Oxygen Control | Slows oxygen consumption while the player is not moving, stretching how long a single breath lasts when held still. | Starter, granted at the first Bio Lab. |
Bioluminescence | Makes the player glow, providing a constant personal light source. | Bio-sample a glowing reef creature. |
Camouflage | Hides the player from predators while standing still. It does not cancel an attack a predator has already committed to. | Bio-sample a camouflaging reef creature. |
Water Retention | Doubles the water gained from anything the player drinks. | Bio-sample a Coral Crab. |
Homing Sense | Marks nearby bases and powered structures on the HUD, useful for finding wrecks and bases to scan for blueprints. | Bio-sample a Hammerhead. |
Dermal Garden | Slowly grows edible algae on the player's skin, producing food on a timer up to a cap. | Bio-sample a Needler Mango. |
Slow Metabolism | Reduces how quickly the hunger meter drains. | Bio-sample a slow-feeding fruit-bearing plant. |
Water Secretion | Slowly fills a water packet by filtering seawater, stacking up to a cap that can be drunk on demand. | Bio-sample a Waterslug. |
With one active slot and the passive slots opening up gradually in the current build, a few BioMods stand out for general use:
Sea Skimmer is a strong default passive for much of the game because it speeds up exploration before a vehicle such as the Tadpole is unlocked.
Water Retention is valuable in the current build because doubling every drink stretches a scarce resource.
Dash is the most flexible active, giving a quick escape or a small speed boost on a short cooldown.
Electric Discharge is a strong defensive active once unlocked, since it clears most threats around the player without needing to aim.
Because BioMods can be swapped at any Bio Lab and do not enter the genome, the player is free to retune a loadout for each expedition, leaning on mobility while exploring and on defense when heading into hostile water. See Survival Mechanics for how hunger, thirst, and oxygen work, and Adaptations for the permanent, genome-altering counterpart system.
Adaptations, the permanent Angel Comb based system that gates environments.
Bio Lab, the base module where BioMods are managed and equipped.
Biosampler, the tool used to collect creature DNA.
