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Underwater Islands

Depth 69–507 mArea 0.37 km²Hostile species 2Open on map →

Whole depth range in reach of: Seamoth + Seamoth depth module MK3 · Prawn suit · Cyclops + Cyclops depth module MK1

Depth profile

Where each resource and creature spawns in the Underwater Islands, by depth (the middle 90% of its spawn spots).
  • Resources
  • Attacks you
  • Other fauna
QuartzQuartz 103–375 m
≈114 loose
Salt depositSalt deposit 128–257 m
≈58 loose
RubyRuby 215–362 m
≈32 loose
LithiumLithium 209–351 m
≈27 loose
GoldGold 38–399 m
From Gold deposit
Silver oreSilver ore 485–521 m
From Silver ore deposit
Uraninite crystalUraninite crystal 485–521 m
From Uranium deposit
SpadefishSpadefish 65–455 m
≈2,138 in this biome
HoopfishHoopfish 40–448 m
≈1,255 in this biome
BladderfishBladderfish 65–455 m
≈1,069 in this biome
PeeperPeeper 64–455 m
≈378 in this biome
BoomerangBoomerang 89–253 m
≈305 in this biome
BonesharkBoneshark 33–470 m
≈207 in this biome · attacks
GarryfishGarryfish 65–252 m
≈118 in this biome
Cave CrawlerCave Crawler 210–348 m
≈100 in this biome · attacks
Show as a table
NameFromToType
Quartz103 m375 mResources
Salt deposit128 m257 mResources
Ruby215 m362 mResources
Lithium209 m351 mResources
Gold38 m399 mResources
Silver ore485 m521 mResources
Uraninite crystal485 m521 mResources
Spadefish65 m455 mOther fauna
Hoopfish40 m448 mOther fauna
Bladderfish65 m455 mOther fauna
Peeper64 m455 mOther fauna
Boomerang89 m253 mOther fauna
Boneshark33 m470 mAttacks you
Garryfish65 m252 mOther fauna
Cave Crawler210 m348 mAttacks you

Dangers

CreatureAttackDamageAlso hitsDepth here
BonesharkBite30 / 3 svehicles, Cyclops, creatures33–470 m
Cave CrawlerBite5 / 1 screatures210–348 m

Creatures (10)

Spadefish≈2,138 random
Hoopfish≈1,255 random
Bladderfish≈1,069 random
Ancient Floater100 fixed
Peeper≈378 random
Boomerang≈305 random
Boneshark≈207 random
Garryfish≈118 random
Cave Crawler≈100 random
Reefback Leviathan12 fixed

Resources & pickups (16)

Redwort593 fixedViolet beau209 fixedSpotted dockleaf118 fixedQuartz≈114 looseSalt deposit≈58 looseRuby≈32 looseLithium≈27 looseBlood vine24 fixedDeep shroom24 fixedRegress shell2 fixedCreepvine1 fixedCreepvine seed cluster1 fixedGabe's feather1 fixedGoldFrom Gold depositSilver oreFrom Silver ore depositUraninite crystalFrom Uranium deposit

Landmarks (2)

Subnautica data: build 83031 (Oct 2025)