FIND // PDA CASE FILE
Can't Find Ruby in Subnautica
Ruby is a depth-gated crafting material. If the early biomes are giving you nothing, switch from loose resource hunting to the deeper reef and Lost River routes.
LAST CHECK
ANSWER LOCK // QUICK RESPONSE
Search the Grand Reef, Deep Sparse Reef, and Lost River seabeds, especially around thermal vents. Ruby is not an early Safe Shallows resource.
SIGNAL CONFIRMEDLOCATION SCAN
BIOMEGrand Reef, Deep Sparse Reef, and Lost River
DEPTHRoughly 200–900m depending on the biome
REQUIRED EQUIPMENTSeaglide, High-capacity O₂ tank, Vehicle with suitable depth module
BRING THIS
- Seaglide
- High-capacity O₂ tank
- Vehicle with suitable depth module
DATA ACCESS LEVEL
Reveal only as much as you need
02 // DIRECTIONDirectionROUTE GUIDANCE
03 // EXACT ANSWERExact answerFULL SPOILER
COMMON REASONS YOU ARE STUCK
- Searching the Safe Shallows or Grassy Plateaus
- Confusing Ruby with Redwort decoration
- Entering the Grand Reef without a return-power plan
EVIDENCE LOG
Verification record
Facts on this page are separated from player speculation. Version-sensitive answers should be rechecked after an official update.
LAST CHECK2026-09-01
- SOURCE // 01Ruby OPEN SOURCE ↗WIKI · checked 2026-09-01
- SOURCE // 02Grand Reef OPEN SOURCE ↗WIKI · checked 2026-09-01
- SOURCE // 03Lost River OPEN SOURCE ↗WIKI · checked 2026-09-01