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
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
Look for the red crystal clusters on the seabed and around thermal vents rather than only checking resource outcrops.
03 // EXACT ANSWERExact answerFULL SPOILER
The Grand Reef is a practical first target; the Lost River and Deep Sparse Reef provide additional routes once your depth equipment allows them.
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