This Subnautica 2 BioMods Guide details what BioMods are in Subnautica 2 and how you can unlock all of them. BioMods are one of the most useful systems in Subnautica 2 because they give your character special abilities. Some BioMods are active skills that you trigger yourself, while others work passively in the background all the time. Most of them are unlocked by scanning specific creatures after getting the Bio Scanner upgrade, which is found later in the game.
BioMods Guide – Subnautica 2
The first BioMods you unlock are available almost immediately after starting the game. When you visit the first bio facility near your lifepod and interact with the biolab, you automatically receive Dash and Pathfinder.
Dash
Dash is a simple but extremely useful movement ability. Activating it quickly launches your character forward. After using it, there is a short cooldown before it can be activated again.
Pathfinder
Pathfinder creates a glowing trail behind you while exploring. This makes it much easier to leave caves, wrecks, or complicated underwater tunnels without getting lost. You can follow the glowing markers back to safety.
Before unlocking the rest of the BioMods, you must first obtain the Bio Scanner attachment. This upgrade connects to your regular scanner and adds a green scanning effect. While you can scan creatures before getting this attachment, the actual BioMods will not unlock until those creatures are scanned with the Bio Scanner equipped. The parts for this upgrade are located in the late-game area.
Sonic Echo
Sonic Echo is unlocked by scanning the Collector Leviathan, which is currently one of the most dangerous creatures in the game. It can be found inside the giant trench separating the early and late-game zones.
Using this ability sends out a large pulse around your character that highlights nearby materials and resources. Ores and useful items become easier to spot, making resource farming much quicker.
Because the Collector Leviathan is extremely aggressive, scanning it can be difficult. Approaching it from above appears to be one of the safer methods.
Electric Discharge
Electric Discharge is earned by scanning the Electric Geordie found in the deeper waters of the late-game region near the alien ruins.
This ability releases a powerful electric shock that repels medium and large-sized predators. It works especially well when aggressive creatures get too close, and you need a quick escape without fighting.
Chum Cloud
To unlock Chum Cloud, you need to scan both a Toxic Sponge and a Hound Gar. The Toxic Sponge is located in caves around the starting region, while the Hound Gar appears closer to the alien ruins in the later areas.
Activating this BioMod throws bait into the water, distracting nearby predators for several seconds. Creatures focus on the bait instead of the player, giving you enough time to escape or continue exploring safely.
Passive BioMods
Sea Skimmer
Sea Skimmer is available from the beginning and is one of the best passive BioMods during the early game.
While swimming close to the sea floor or walls, your movement speed increases dramatically. This allows you to cover much larger distances, collect resources faster, and explore more efficiently before unlocking vehicles.
Oxygen Control
This passive also unlocks at the start. Oxygen drains more slowly whenever you stop moving underwater.
The effect is most noticeable while scanning objects or staying still inside deep areas. Although it is less useful during constant movement, it can still help players who struggle with oxygen management early on.
Bioluminescence
Bioluminescence requires scans from the Electric Geordie and the Sand Spear. Sand Spears are found in sandy areas of the starting biome and attack when approached.
Once equipped, your character begins glowing underwater. Different creatures may react differently to the light, with some avoiding you while others may become more interested in your presence.
Camouflage
Camouflage is unlocked by scanning Bullet Heads found around the giant canyon between the early and late-game regions.
This BioMod makes you nearly invisible whenever you stop moving. It is especially useful when dangerous predators are nearby because remaining still allows you to avoid detection entirely. Surprisingly, it even works against the Collector Leviathan.
Water Retention
Water Retention comes from scanning the Coral Crab located in the warmer areas between the early and mid-game sections. This creature is located 380 meters east of the lifepod.
This passive greatly increases the amount of hydration gained from water items. Drinks become much more effective, helping reduce the need to constantly search for fresh water.
Homing Sense
Homing Sense requires scans from both the Surge Jelly and the Hammerhead. You can find the Hammerhead on the east side when you start from your lifepod. On the other hand, Surge Jelly is found 170 m away from the lifepod, in the southeast direction.
This ability detects powered bases nearby and marks them with an icon. It becomes very useful for discovering hidden facilities, blueprints, and future content areas that may otherwise be missed during exploration.
Threat Sense
Threat Sense is unlocked by scanning the Hoverthorn, a small fish found in the late-game zone.
Whenever dangerous creatures are nearby, the BioMod gives warning signals to alert you. This can help prevent surprise attacks and give players extra awareness while exploring risky locations.
Dermal Garden
Dermal Garden is unlocked by scanning the Needler Mango found in the deep trenches of the late-game biome.
Over time, this passive slowly generates algae food directly into your inventory. The food stacks gradually and helps reduce how often you need to hunt or gather meals. While it does not completely remove hunger management, it makes survival easier during long exploration sessions.
Slow Metabolism
Slow Metabolism comes from scanning a Nibbler Mango near the Angel Comb area.
Instead of generating food items like Dermal Garden, this BioMod simply slows down how quickly hunger drains. The overall result is fairly similar, but some players may prefer the simplicity of slower food loss instead of carrying extra algae blocks.
Water Secretion
Water Secretion is unlocked by scanning Water Slugs, which are commonly found throughout the game world.
This passive slowly creates filtered water packets in your inventory over time. The stored water eventually reaches a limit, but it still provides a reliable backup source of hydration during exploration.
At the moment, players can only equip one active and one passive BioMod at a time, which makes choosing the right combination important. Some BioMods are clearly more useful than others right now.
That is all for this guide. Additional Subnautica 2 guides are linked below:
- Subnautica 2 Moonpool Guide – How to Make
- Subnautica 2 Tadpole Guide – How to Get, All Upgrades
- Subnautica 2 Healing Guide – How to Heal
- How to Get Food and Water in Subnautica 2
- Subnautica 2 Oxygen Guide – How to Replenish, Increase Maximum Oxygen
- Where to Get Silver in Subnautica 2
This concludes our Subnautica 2 BioMods Guide. If you want to add anything to this guide, feel free to use the comments section below.
