Last updated: 13 July 2026

Subnautica 2 Creature Guide — Passive, Predators & Apex Threats

The alien ocean in Subnautica 2 is full of life, and most of it would rather ignore you than eat you. Knowing which creatures fall into which category — passive, opportunistic predator, or apex threat — is the difference between a confident dive and a panicked retreat. This guide breaks down the creature tiers you'll encounter in the early and mid game, explains the threat systems, and tells you exactly how to handle each type.

01How the Creature Threat System Works

Subnautica 2 uses an aggression and territory system rather than making every creature hostile by default. Understanding its rules removes most of the fear from early exploration:

• Passive creatures have no aggression state. They will not attack you under any circumstances — they may flee if you swim toward them, but they won't follow.
• Territorial predators are neutral until you enter their detection radius or make sudden movements near them. Slow, calm movement often lets you swim past them safely.
• Apex predators are always on patrol and will attack on sight within their detection range. There is no way to avoid them by being 'calm' — you need to either leave the area, hide, or use deterrent tools.
• Scanning a creature fills in its PDA entry which includes its aggression rating and any known deterrents. Always scan before acting.

From update 1.1 'Adaptive Measures' onward, most creatures display a visible flinch and flee response when struck by the Survival Multitool, and are temporarily prevented from retaliating except in self-defense during that window. This creates a brief safe interval for repositioning or scanning after landing a hit.

Sound also matters. Fast Seaglide movement, vehicle engine noise, and firing tools near a territorial predator can trigger its aggression state even if you weren't technically inside its detection range.

02Passive Creatures — Safe and Useful

These animals pose no threat and many of them are actively useful for food, farming, or breeding in an Alien Containment tank.

• Peeper — the large-eyed orange fish common in the Safe Shallows. Passive, easy to catch by hand, and the best early food source when cooked. Can be bred in Alien Containment.
• Bladderfish — round, white fish at the surface. Passive. Cooked, they provide fresh water instead of food — invaluable early on before you have a water filtration system.
• Garryfish — long, pale fish found in the deeper Kelp Forest. Passive. Cooks into a high-nutrient meal.
• Eyeye — a red, round fish with a prominent eye. Passive, found in cave biomes. Its cooked form provides both food and a small dose of water.
• Boomerang — dart-shaped silver fish in open water. Passive and fast. When cooked, provides balanced food and water.

Scan each passive fish you encounter — the PDA entry tells you whether it can be bred in Alien Containment and what the cooked version provides. Setting up a breeding pair of Peepers and Bladderfish in an early Alien Containment tank solves your food and water needs permanently.

03Territorial Predators — Manage, Don't Panic

Territorial predators are the mid-tier of Subnautica 2's creature hierarchy. They will attack if you enter their range, but they're manageable with the right approach and tools.

Stalker — a mid-sized, fast-moving carnivore found at the edge of the Kelp Forest and around wreck debris. Stalkers are attracted to shiny metal objects — they will pick up Metal Salvage and carry it around, which is actually useful since it concentrates resources. A Stalker will attack if you swim between it and a piece of metal it's fixated on. Use a Flare to distract it or a Repulsion Cannon blast to drive it back.

Sand Shark — a burrowing predator found in sandy-floored biomes. It hides under the sand and lunges upward when you swim over it. Once you know the tell (a slight sand disturbance or an audio cue), you can swim around its patch safely. A Stasis Rifle shot freezes it completely.

Crabsnake — lives inside large Jellyshroom Cave mushrooms, striking outward at anything that swims too close to its mushroom. Highly predictable: don't approach the mushroom stalks and it will never attack you. Useful later for a unique material it drops.

Bloom Parasite — a small cephalopod-like predator found in the Coral Gardens and Ruins biomes. It briefly stares at its target before rushing in to bite, preferring to attack large creatures and infecting them with a virus that heightens their aggression. Rebalanced in update 1.1 as the primary encounter creature in Coral Gardens — expect regular contact when exploring that biome. The Sonic Resonator is particularly effective against them, disrupting the viral crystals in their tissue.

• Moving slowly and in a straight line — not darting around — reduces your threat signature near territorial predators.
• If a predator is already aggroed, swim directly toward the surface at maximum speed rather than swimming parallel to it.
• The Repulsion Cannon is the single best early deterrent tool. A single shot pushes most territorial predators several metres away, breaking their aggro.

04Apex Predators — Respect and Avoid

Apex predators are the ocean's most dangerous occupants. They patrol set territories, have long detection ranges, and deal high damage. In early and mid-game, the correct answer when you encounter an Apex predator is almost always: leave the area.

Reaper-class Leviathan (or equivalent) — large, serpentine creatures that patrol specific deep-water zones and cave entrances. They make a distinctive audio cue (a low, resonant groan) before becoming visible — this is your warning to turn back. A single bite takes most of your health; two bites are fatal without upgrades. The Seamoth and similar vehicles offer partial protection but a Leviathan can disable them with sustained attacks.

Ghost-class Leviathan (or equivalent) — even larger, found in the deepest abyssal biomes. Completely transparent, making them hard to spot until they're already within attack range. Never enter their zone without a reinforced vehicle and Prawn Suit-equivalent equipment.

• You cannot outswim an Apex predator. The Seaglide is fast but not faster than a Leviathan in open water. If one is chasing you, turn toward rock cover or a cave entrance — Leviathans don't follow into narrow spaces.
• The Stasis Rifle (a mid-game craftable) temporarily freezes any creature, including Apex predators. This does not damage them but buys 10–15 seconds to escape.
• Apex predators guard specific zones — learn where their territories are and route your dives around them rather than through them.
• Scanning an Apex predator from a safe distance is worth doing (it fills the PDA entry) but do not approach to do so.

05Creature Deterrent Tools

These tools are specifically designed for managing creature encounters. Prioritise crafting them in roughly this order:

• Flare — cheap (Titanium × 1, Magnesium × 1), throwable light source that also temporarily distracts most predators. Not reliable against apex threats but excellent against Stalkers and mid-tier creatures.
• Repulsion Cannon — fires a burst of kinetic force that pushes creatures (and objects) backward. Does not deal damage but reliably breaks aggro on territorial predators. Requires Wiring Kit, Power Cell, and Computer Chip.
• Sonic Resonator — emits a focused sound pulse that inflicts a brief dizzy state on most creatures, preventing retaliation for a short window without pushing them away. Useful for scanning hostile creatures up close since it doesn't scatter the target. As of update 1.1, the stun effect was added; the Sonic Resonator is also the most effective tool against Bloom Parasites.
• Stasis Rifle — fires a stasis sphere that freezes everything inside it, including Apex predators. The freeze lasts 10–15 seconds, giving you time to escape or scan. Requires advanced materials (Ruby, Wiring Kit, Computer Chip) — a mid-game craft.
• Propulsion Cannon — pulls objects (or small creatures) toward you and throws them. Useful for clearing Sand Sharks from dive paths and for collecting distant resources. A side benefit: throws small predators back effectively.

Note: harming creatures when using deterrent tools in non-threat situations is worth avoiding — the game tracks some creature populations, and over-hunting passive or mid-tier species can reduce their numbers in a biome over time.

06Creatures That Can Help You

Not every creature interaction is defensive. Several animals in Subnautica 2 offer useful resources or even assistance:

• Stalker teeth: Stalkers periodically shed teeth near Metal Salvage they've been carrying. These teeth are a crafting ingredient for several mid-game tools. You can farm Stalker teeth without ever fighting one by leaving a piece of Metal Salvage in their territory and checking back later.
• Crashfish: Actually a passive creature until disturbed — it hides in small rocky outcroppings and launches itself outward if you approach. Don't reach into small rocky holes without a Flare first. Their remains, if caught quickly after detonation, yield a useful organic material.
• Gasopod: Releases toxic gas pods when threatened. You can collect these dropped pods (gas pod fragments) to craft the Gas Torpedo, a deterrent against predators.
• Passive fauna in general: most passive creatures yield raw organic material when harvested using the Knife. These organics fuel the Bioreactor for base power.