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This biome is late-game content: a deep biome, a leviathan or part of the story. It stays hidden until you choose to see it.

Primary Containment Facility

Depth 1558–1621 mUndergroundHostile species 3

Whole depth range in reach of: Prawn suit + Prawn suit depth module MK2 · Cyclops + Cyclops depth module MK3

Depth profile

Where each resource and creature spawns in the Primary Containment Facility, by depth (the middle 90% of its spawn spots).
  • Resources
  • Attacks you
  • Other fauna
Gel sackGel sack 1564–1610 m
≈24 loose
PeeperPeeper 1508–1605 m
≈393 in this biome
BladderfishBladderfish 1506–1599 m
≈222 in this biome
HoverfishHoverfish 1506–1599 m
≈161 in this biome
GarryfishGarryfish 1541–1610 m
≈115 in this biome
HolefishHolefish 1570–1635 m
≈108 in this biome
Rabbit RayRabbit Ray 1508–1605 m
≈105 in this biome
ReginaldReginald 1530–1597 m
≈61 in this biome
BoomerangBoomerang 1564–1608 m
≈55 in this biome
StalkerStalker 1503–1593 m
≈32 in this biome · attacks
BonesharkBoneshark 1503–1593 m
≈32 in this biome · attacks
HoopfishHoopfish 1561–1601 m
≈16 in this biome
OculusOculus 1607–1646 m
≈13 in this biome
ShuttlebugShuttlebug 1614–1655 m
≈8 in this biome
Cave CrawlerCave Crawler 1611–1651 m
≈5 in this biome · attacks
Show as a table
NameFromToType
Gel sack1564 m1610 mResources
Peeper1508 m1605 mOther fauna
Bladderfish1506 m1599 mOther fauna
Hoverfish1506 m1599 mOther fauna
Garryfish1541 m1610 mOther fauna
Holefish1570 m1635 mOther fauna
Rabbit Ray1508 m1605 mOther fauna
Reginald1530 m1597 mOther fauna
Boomerang1564 m1608 mOther fauna
Stalker1503 m1593 mAttacks you
Boneshark1503 m1593 mAttacks you
Hoopfish1561 m1601 mOther fauna
Oculus1607 m1646 mOther fauna
Shuttlebug1614 m1655 mOther fauna
Cave Crawler1611 m1651 mAttacks you

Dangers

CreatureAttackDamageAlso hitsDepth here
BonesharkBite30 / 3 svehicles, Cyclops, creatures1503–1593 m
StalkerBite20 / 3 screatures1503–1593 m
Cave CrawlerBite5 / 1 screatures1611–1651 m

Creatures (14)

Peeper≈393 random
Bladderfish≈222 random
Hoverfish≈161 random
Garryfish≈115 random
Holefish≈108 random
Rabbit Ray≈105 random
Reginald≈61 random
Boomerang≈55 random
Stalker≈32 random
Boneshark≈32 random
Hoopfish≈16 random
Oculus≈13 random
Shuttlebug≈8 random
Cave Crawler≈5 random

Resources & pickups (12)

Acid mushroom303 fixedCave bush100 fixedViolet beau73 fixedRedwort28 fixedGel sack≈24 looseSpotted dockleaf19 fixedRouge cradle16 fixedSea crown16 fixedFurled papyrus15 fixedBlue palm13 fixedGabe's feather10 fixedIon cube1 fixed

Subnautica data: build 83031 (Oct 2025)