Bone-cutting bite
Public scan text says its jaws are adapted to cut through tough flesh, edged with iron and salt structures, and capable of a very fast bite.
Creature tracker · Hotfix 3
Marrowbreach Location & Survival Notes
Marrowbreach is a dangerous sharklike predator in Subnautica 2. Hotfix 3 increased its damage and made attacks less frequent.
Hotfix 3: Marrowbreaches hit harder but attack less often.
First decision
Treat Marrowbreach as a hostile predator. Hotfix 3 increased its damage and made attacks less frequent.
Current status
| Field | Current value | What this means |
|---|---|---|
| Name | Marrowbreach | Public creature databases and community wiki pages now use this name for a Subnautica 2 fauna entry. |
| Creature type | Aggressive sharklike predator | Public databases describe it as a dangerous selachian predator, while Hotfix 3 now gives official tuning context. |
| Threat level | High | Hotfix 3 increased Marrowbreach damage and spaced attacks farther apart. |
Behavior notes from public scan text
Weak visual reliance
Its small eyes are tied closely to bite timing, while motion, electric-field, and sound detection appear to matter more than sight.
Pre-attack signals
Circling and test bumps are useful warning behavior. Hotfix 3 says attacks are now spaced out more, but that does not make the first bite safe.
Hotfix 3 tuning
Unknown Worlds increased overall Marrowbreach damage and made attacks occur less frequently.
Possible light distraction
Several public database entries mention that bright lights may distract it. Treat that as a clue, not a guaranteed stun or escape exploit.
How to survive the first scan
The clean rule is simple: scan only from a recoverable position. If you spot circling, test bumps, or nearby fauna reacting to a larger threat, leave the open water first and finish the scan later.
- Keep the scanner out only long enough to tag it, then move. Long stationary scans are a bad habit around a fast predator.
- If you see nearby fauna acting as if something larger is hunting, assume the route is unsafe until you identify the threat.
- After Hotfix 3, leave more health margin than older guides recommend. Higher damage matters even when attacks are less frequent.
- Use terrain, base exits, and vehicle cover instead of trying to trade damage. Fighting one is not a sensible plan with the current route guidance.
- In co-op, call out circling or test bumps immediately. One assigned lookout buys more time than four divers all looting the same wreck.
Location status
Watch for the creature itself and its circling behavior when scouting unfamiliar areas. Keep your return path clear and avoid stopping for a scan once it closes the distance.
For now, use the page as a risk profile: if you are pushing into deeper wreck, bone, or Graveyard-style routes, assume Marrowbreach is a possible encounter and prepare a clean exit.
References
Unknown Worlds Hotfix 3
Official patch noteOfficial source for increased Marrowbreach damage and less frequent attacks.
Dexerto Subnautica 2 Wiki
Public databaseCreature name, predator classification, and biological-report wording.
MetaForge creature database
Public databaseCross-check for the same biological report and scan-style description.
Subnautica Wiki / Fandom
Community wikiCommunity classification as aggressive fauna and gallery/context references.
Marrowbreach FAQ
Is Marrowbreach a real Subnautica 2 creature?
Yes. Unknown Worlds names Marrowbreaches in the Hotfix 3 patch notes.
Is Marrowbreach dangerous?
Yes. Hotfix 3 increased overall Marrowbreach damage, while spacing attacks farther apart. Treat it as a high-risk predator and use the longer gap between attacks to retreat.
How do you survive a Marrowbreach encounter?
Back off when it circles or test-bumps, use terrain or a vehicle to break the attack line, and do not linger for loot or scans after it commits to a chase. After Hotfix 3, leave extra health margin because the official patch increased damage.
What changed for Marrowbreach in Hotfix 3?
Unknown Worlds increased overall damage and spaced attacks out so they occur less frequently.
Related creature pages
Related creatures and survival routes.