Subnautica 2 Best Biomod Builds & Tier List: DNA Modification Ranked
Tier list and best builds for all 15 Biomods in Subnautica 2. Ranked passive and active DNA modifications with recommended loadouts for exploration, combat, and deep diving.
Subnautica 2 gives you 15 Biomods to work with — 5 active abilities and 10 passive upgrades. You can’t equip them all at once, so picking the right combination matters. Some Biomods are clearly better than others. Some are situational. A few are traps that sound good on paper but waste your slots.
This guide ranks every Biomod, explains what works together, and gives you ready-to-use loadout recommendations for different playstyles.
How Biomods Work (Quick Recap)
The Biomod pipeline has three steps:
- Biosampler — extract DNA samples from creatures and plants.
- Bio Lab — refine those samples into usable serums.
- Gene Augmentation Station — apply the serum to yourself.
Different biomes produce different Biomod pools. Deeper biomes yield more powerful options. You can swap Biomods at the Gene Augmentation Station anytime, so nothing is permanent. Experiment freely.
For a full walkthrough on unlocking the system, see our Biomod unlock guide.
Passive Biomods Tier List
Passive Biomods are always active once equipped. No cooldowns, no activation required. They just work. There are 10 passive Biomods total; here are the standouts.
S Tier
Slow Metabolism Slows oxygen consumption when you’re not moving. In a game where oxygen is your constant bottleneck, any breathing-rate reduction is golden. Park yourself in a safe spot while scanning or waiting for a predator to pass, and your O2 stretches noticeably further.
Camouflage Makes you invisible to predators while you’re stationary. This is your safety net. Stop moving and creatures lose track of you. For scanning aggressive fauna, waiting out dangerous patrols, or just catching your breath near a predator, Camouflage is invaluable.
A Tier
Bioluminescence You glow in the dark. Zezura gets dark — really dark — in deep caves and during the night cycle. This Biomod provides personal illumination without relying on tool-based light sources. It also looks great, which is a bonus.
Sea Skimmer Swim faster when close to underwater surfaces or the seafloor. Since most exploration happens near terrain rather than in open water, this passive speed boost is active more often than you’d expect.
Dermal Garden Slowly grows nutritious algae on your skin. A passive food source that reduces your dependence on gathering trips. Not flashy, but on long expeditions it keeps your hunger from dropping as fast.
B Tier
Detector Detects nearby bases with electrical power. Useful for finding colonist structures and points of interest you’d otherwise swim past.
C Tier
The remaining passives are situational. Experiment with what fits your playstyle, but the above represent the most impactful options.
Active Biomods Tier List
Active Biomods are abilities you trigger manually. Each has a cooldown period after use. There are 5 active Biomods.
S Tier
Dash A quick dash in any direction. Use it to dodge predators, close distance to resources, or reposition fast. The cooldown is short enough for frequent use and the survival value is enormous.
Electric Discharge Emit an 800-volt electric shock that deters medium and large predators. Your primary offensive option when something aggressive locks onto you. Creates enough distance to escape or continue working.
A Tier
Chum Cloud Release a cloud of bait to distract predators. Predators investigate the cloud instead of you, giving you time to scan, gather, or flee. Pairs well with Dash for a distract-and-run strategy.
B Tier
Sonic Echo Emit a sonar pulse that highlights nearby resources. Useful for finding mineral deposits in cluttered or dark environments, but less critical than survival-focused actives.
Pathfinder Release a trail of pheromones you can follow to find your way back. Good for cave exploration where getting lost is a real risk, but beacons serve a similar purpose.
Best Biomod Builds
The Explorer (General Purpose)
Passives: Slow Metabolism, Bioluminescence, Sea Skimmer Actives: Dash, Electric Discharge
This is the default build for most of the game. Extended oxygen when stationary, visibility in dark zones, and faster seafloor travel. Dash gets you out of trouble, Electric Discharge handles anything that gets too close.
Why this works: Slow Metabolism extends every scan stop. Bioluminescence means you don’t waste time fiddling with light sources. Sea Skimmer speeds up terrain-hugging exploration. Dash and Electric Discharge cover escape and defense.
The Deep Diver
Passives: Slow Metabolism, Camouflage, Bioluminescence Actives: Dash, Electric Discharge
Built for the deepest biomes where oxygen is precious and predators are serious. Slow Metabolism preserves your air. Camouflage lets you stop and go invisible when something dangerous patrols past. Bioluminescence lights the way.
Swap Bioluminescence for Dermal Garden if you’re planning an extended trip where hunger is a bigger concern than darkness.
The Combat Swimmer
Passives: Sea Skimmer, Bioluminescence, Camouflage Actives: Electric Discharge, Dash
For players who want to engage rather than flee. Electric Discharge stuns aggressive fauna. Dash lets you reposition. Camouflage gives you a reset button — stop moving and predators lose you.
The Long Expedition
Passives: Slow Metabolism, Dermal Garden, Sea Skimmer Actives: Dash, Pathfinder
When you’re heading far from base and don’t want to pack your entire inventory with food. Dermal Garden generates passive nutrition. Slow Metabolism preserves oxygen at rest stops. Pathfinder leaves a pheromone trail so you can find your way back through complex cave systems.
The Co-op Support
Passives: Slow Metabolism, Bioluminescence, Detector Actives: Chum Cloud, Electric Discharge
In a four-player squad, having one player run support makes everyone’s life easier. Chum Cloud distracts predators away from the group during resource gathering. Electric Discharge provides emergency defense. Detector helps locate colonist structures the team might otherwise miss.
Biome-Specific Biomod Sources
Where you sample determines what you unlock. Here’s the general distribution:
- Shallow zones (0-100m): Basic passives and actives — Dermal Garden, Detector, Pathfinder
- Mid zones (100-300m): Mid-tier options — Bioluminescence, Dash, Sonic Echo
- Deep zones (300m+): High-tier everything — Camouflage, Sea Skimmer, Electric Discharge
- Volcanic zones: Specialized passives tied to heat-zone fauna
- Unique fauna: Some Biomods only come from specific creatures. The rarest abilities require tracking down particular species.
Push deeper as soon as you can. The shallow zone Biomods are mostly filler. The good stuff lives below 200 meters.
Quick Tips
- Slow Metabolism is the most universally useful passive. It stretches your oxygen at rest, which happens more than you think.
- Dash and Electric Discharge are the best active combo for survival. If you’re not sure what to run, start there.
- Swap Biomods at the Gene Augmentation Station before heading to a new biome. Match your loadout to the destination.
- In co-op, coordinate builds. Don’t run four identical loadouts — spread the utility across your squad.
- Deeper biomes yield more Biomod options. Invest time in deep exploration early and your choices improve dramatically.
The Biomod system rewards preparation. Know where you’re going, what threats you’ll face, and equip accordingly. The Explorer build handles 80% of situations. The remaining 20% is why the other builds exist.