Subnautica 2 Creatures Guide: Biomods, Fauna, Scans

Subnautica 2 creatures are not just background danger. Use the Biomod Scan Planner above to choose a target, compare scan value against route risk, and classify behavior, cargo risk, oxygen margin, and co-op setup before moving closer. Fauna, mobs, and monsters shape the map, control resource risk, and decide when a dive becomes too expensive.

Mark the encounter in the map guide, decide whether a vehicle route is safer than swimming, and check the resources guide before risking rare cargo near an untested threat.

Creature names, behavior, and danger values may change during Early Access. This page focuses on survival habits and scan decisions that stay useful while live details settle.

Quick Answer

Do not rush the scan. Watch the creature, decide whether it is passive, avoidant, territorial, or hostile, mark the biome, identify an exit, and approach only when you have oxygen margin. Use the biomod planner and copy button above for a quick co-op callout when the route needs a clean retreat.

Bestiary Field Table

Use this table until exact creature names, biome entries, and damage values are confirmed in the current build.

Creature type	First behavior to watch	Scan timing	Avoidance rule	Route note
Passive fauna	Ignores the player or flees	Safe after checking oxygen	Do not chase into caves or deeper water	Good for learning movement and scale
Avoidant creature	Keeps distance or reacts to approach	Scan only if it loops predictably	Let it flee instead of forcing contact	Record where it runs or hides
Territorial threat	Guards a path, resource, or cave edge	Return with a clear exit and better margin	Mark the boundary and route around it	Treat nearby resources as risky
Hostile monster	Charges, follows, or ambushes	Do not scan on first contact	Retreat first, study later	Add a danger marker and return with support
Unknown scannable	Scanner reacts but behavior is unclear	Wait one full movement cycle	Leave if oxygen or visibility drops	Add a field note before naming it

What Not To Trust Yet

Creature pages become low-quality very quickly when they invent names, damage numbers, or spawn locations. During Early Access, publish only what can be checked in the current build.

Claim type	Safe before verification?	Better approach
Exact creature names	Only if seen in-game or official material	Use descriptive field notes until confirmed
Damage values	No	Explain risk behavior and escape habits
Spawn coordinates	Only after live checking	Give biome and landmark context
Best way to fight	Usually no	Teach avoidance, scanning, and route planning first
Co-op tactics	Yes, if framed as habits	Focus on callouts and regrouping

Field Note Template

Use this when you meet something new.

Field	What to write
Creature description	Shape, color, size, sound, movement pattern
Location	Biome edge, landmark, route name, rough depth if known
Behavior	Ignores, flees, patrols, follows, charges, ambushes
Trigger	Distance, light, scanning, resource gathering, entering cave
Escape path	Which wall, landmark, or route gets you home
Revisit plan	Better oxygen, second player, vehicle, or later patch check

Good creature notes make a dangerous route repeatable. Bad creature notes just say “big thing near cave.”

Creature Response Ladder

Stage	Action	Goal
Observe	Watch movement from distance	Learn whether it patrols, guards, flees, or ambushes
Mark	Note biome, depth, and landmarks	Make the encounter repeatable
Scan	Approach only with an exit path	Capture info without overcommitting
Retreat	Leave before oxygen pressure rises	Avoid panic deaths
Return	Bring better gear or a vehicle later	Turn danger into a planned route

Danger Signals

Signal	What it usually means	Response
Sudden sound change	A threat or biome transition may be near	Slow down and look around
Creature guarding a path	Resource or route may be valuable but risky	Mark and return later
Tight cave movement	Escape path is limited	Do not scan unless oxygen is high
Repeated attacks near one landmark	That area needs a hazard note	Route around it or stage gear nearby

Co-op Creature Calls

In co-op, creature danger becomes communication danger. A player who screams “big thing” is less useful than a player who says “large creature, north wall, near red plants, retreat to base route.” Agree on short callouts before deep exploration.

Callout	Meaning
”Mark only”	Do not engage or scan yet
”Safe scan”	One player scans while another watches oxygen and route
”Hard retreat”	Stop gathering and leave immediately
”Return later”	The area needs better gear, not bravery

Scan Discipline

Scanning is useful only when it does not turn the dive into a recovery mission. Use a simple rule: if you cannot name your exit, do not scan yet. If you are carrying rare materials, bank them first. If oxygen is already pressuring you, leave and come back.

Before scanning	Why
Check oxygen margin	Prevents panic pathing
Face the exit once	Makes retreat automatic
Watch one full patrol cycle	Reveals whether the creature loops or reacts
Drop or bank rare materials	Lowers the cost of mistakes
In co-op, assign a watcher	One player scans while another watches route and oxygen

What To Check

Note	Example
Biome	Mid-depth cave edge
Creature behavior	Patrols near opening, reacts to close approach
Resource nearby	Unknown node behind patrol path
Escape path	Return along left wall, avoid lower tunnel
Next step	Bring vehicle or second player

When to Return Later

Leaving is not failure in Subnautica 2. If a creature blocks a route, the smart move is often to mark the area, gather safer materials, craft the missing upgrade, and come back with better oxygen or vehicle support. Early Access survival is about reducing repeated losses, not proving you can force a scan under pressure.

Return later if…	Reason
Oxygen is below your comfort margin	Panic swimming causes bad decisions
You do not know the exit	Creature pressure plus bad navigation is deadly
The creature reacts before you scan	Behavior matters more than curiosity
You are carrying rare materials	Bank resources before risky scouting

Creature Notes For Guide Updates

Treat creature notes as reliable only when they include the same current-build details: name, biome, behavior, scan risk, escape habit, and whether the creature blocks a resource route. Use damage values only when they are tested in-game or officially documented.

Field to record	Trust it when…
Name	The scanner, log, or official material confirms it
Biome	The route has been checked in the current build
Threat level	Multiple encounters support the pattern
Best response	Avoidance, scan timing, or gear need is clear

Creature Checks To Keep Separate

Once live names and behaviors are stable, treat the most dangerous creatures as separate problems: biome, behavior, safe distance, scanning advice, and whether avoidance or route planning is the better answer. Do not trust copied creature notes unless they show the build and location where the behavior was checked.

Related Pages

• Subnautica 2 Map for marking danger zones.
• Subnautica 2 Biomes for biome risk staging.
• Subnautica 2 Co-op for group survival rules.

Sources

• Subnautica 2 on Steam
• Unknown Worlds Subnautica page