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  "description": "The exact spot in the Shallows where Coral Crabs drop the deposits you need for Biofuel Blocks.",
  "path": "/crab-feces-in-subnautica-2-location-and-bioreactor-use/",
  "publishedAt": "2026-05-20T04:41:30.000Z",
  "site": "https://allthings.how",
  "tags": [
    "@Late"
  ],
  "textContent": "Crab Feces is a coprolyte-like resource in Subnautica 2 that doubles as high-density bioreactor fuel. It comes from a single source in the Shallows, and only one creature in the region produces it: the Coral Crab.\n\n🦀\n\nQuick answer: Swim northeast from your Lifepod to the Welcome Center, then take the left path until you reach the open area with the giant Coral. Coral Crabs surface from the Coral Domes here, and oval-shaped Crab Feces deposits sit scattered on the seafloor around them.\n\nImage credit: __Unknown Worlds Entertainment (via YouTube/@Late Night Stream)__\n\n* * *\n\n### Where Coral Crabs spawn\n\nCoral Crabs are large, passive crustaceans that hide inside Coral Domes in the Shallows biome. They surface when you approach, but they will not attack. Several Coral Dome sites exist across the starting region, with the most accessible one sitting northeast of the Lifepod near the Welcome Center landmark.\n\nA second reliable cluster sits east of the Lifepod, roughly 300 meters out near the edge of the volcanic region. That area is also used as a Salt farming route, so you can collect Crab Feces and Salt deposits on the same trip.\n\n* * *\n\n### How to collect Crab Feces\n\n**Step 1:** Leave the Lifepod and head northeast toward the Welcome Center. Keep close to the seafloor so you can spot the large Coral structures.\n\nLeave the Lifepod and head northeast toward the Welcome Center | Image credit: __Unknown Worlds Entertainment (via YouTube/@Late Night Stream)__\n\n**Step 2:** At the Welcome Center, take the left-hand path until the terrain opens into a flat area dominated by a giant Coral. Approach the Coral Dome to draw the Coral Crab out.\n\n**Step 3:** Look around the base of the dome for small, oval-shaped deposits resting on the sand. Pick them up by hand. No tool is required, and the crab will not interfere.\n\n**Step 4:** Move on to neighboring Coral Domes to gather more. Deposits respawn over time, so you can revisit the same sites once your stockpile runs low.\n\nLook around the base of the dome for small, oval-shaped deposits | Image credit: __Unknown Worlds Entertainment (via YouTube/@Late Night Stream)__\n\n* * *\n\n### What Crab Feces is used for\n\nProperty| Detail\n---|---\nType| Material\nSource| Coral Crab habitats in the Shallows\nStack size| 1\nDescription| Coprolyte-like deposit of excreta with extreme energy density\nPrimary use| Crafting Biofuel Blocks at the Processor\nRecipe cost| 2 Crab Feces per Biofuel Block\n\nThe deposit feeds directly into the Bioreactor as fuel, and processing two of them at a Processor yields a Biofuel Block. That output is one of the most efficient power sources for a base early on, which makes the Shallows trip worth repeating whenever your Bioreactor stockpile drops.\n\n* * *\n\n### Confirming it worked\n\nYou will know the pickup registered when the deposit disappears from the seafloor and Crab Feces appears in your inventory under Materials. At the Processor, the Biofuel Block recipe becomes available the moment two units are in storage. If the recipe stays locked, you are likely short on the required count or have not unlocked the Biofuel Block blueprint yet through scanning.",
  "title": "Crab Feces in Subnautica 2: Location and Bioreactor Use",
  "updatedAt": "2026-05-20T04:41:32.343Z"
}