How to Build a Tadpole in Subnautica 2: The Ultimate Guide

Sailing through the bioluminescent depths of Subnautica 2 in a Tadpole is one of the most satisfying experiences in the game. It offers a safe, oxygen-rich sanctuary while exploring hostile waters, allowing you to zoom beneath the waves without the constant threat of suffocation or predation. However, the ocean’s fauna are always eager to test the integrity of your glass cockpit.

To enjoy this mode of transport, you must first locate scattered fragments, scan them to unlock the blueprint, and gather specific resources to build the necessary infrastructure. Here is exactly how to build a Tadpole in Subnautica 2.

Scanning for Tadpole Fragments

You must scan three distinct Tadpole fragments to unlock the blueprint. While there are five known locations in the early game, these three offer the most efficient path to crafting your first vehicle.

1. The Old Habitat Ruins Located approximately 370 meters north of your Lifepod, this site is part of the "Quaker’s Black Box" questline.

  • Navigate to the Old Habitat colony ruins.
  • Head slightly northwest up the ravine, close to the entrance of the ruins.
  • Look for the crashed Tadpole fragment near the structure.
  • Tip: Use this opportunity to scan the Sonic Resonator, Processor, and Scanner Station also located here.

2. The Northeastern Ravine This location doubles as an early source for lead, essential for crafting the Sonic Resonator.

  • Travel 280 meters northeast of the Lifepod.
  • Follow a bearing of 75° until you spot a blue natural current dropping into a ravine.
  • Dive down to the ravine floor where a colony ruin platform sits on the left.
  • The fragment is located close to the platform’s edge.

3. The Abyssal Crater Edge Found at a lower depth near The Great Jaw, this location requires better oxygen management.

  • Head northeast from the Lifepod, over the drop-off.
  • Follow the wall straight down to the edge of the abyssal crater.
  • Scan the fragment among the colony wreckage at the bottom.
  • Recommendation: Equip Air Bladders and the Standard Air Tank upgrade. If possible, craft a Wakemaker to reach this area faster and swim more efficiently.

Constructing the Tadpole Dock

Unlocking the blueprint is only the first step. To house and craft a Tadpole, you must construct a Moonpool with specific upgrades and ample space.

Base Requirements:

  • Space: You need a large room with significant vertical clearance. The Tadpole Dock extends downward, so your base must accommodate its full height.
  • Vehicle Fabricator: This must be built on the side of your Moonpool to enable vehicle crafting.

Moonpool Construction Costs: To build the base Moonpool and the Vehicle Fabricator, gather the following resources:

  • 5x Titanium
  • 4x Titanium Ingots
  • 2x Copper Wire
  • 2x Glass
  • 1x Copper Ingot
  • 1x Silver Ingot

Note: You can process raw metals into ingots using the Processor facility.

Crafting the Tadpole Vehicle

Once your Moonpool is active, you can use the Vehicle Fabricator to craft the Tadpole itself.

Tadpole Crafting Costs:

  • 2x Titanium Ingots
  • 1x Glass
  • 1x System Chip
  • 1x Power Cell

While most materials are straightforward, the Power Cell and System Chip require careful planning.

Resource Acquisition Guide:

  • Strong Acid (for Power Cells): The easiest source is harvesting Necrolei Cysts found in the Jelly Forest near the Old Habitat.
  • Salt: Easily collected from the cave where Chap’s habitat and black box are located.
  • System Chip: Ensure you have scanned the necessary artifacts in your early game progression to have this available.

Maintenance and Survival Tips

Once your Tadpole is built, it serves as a vital mobile base. However, it is not invulnerable.

  • Craft a Power Cell Backup: Always keep an extra power cell on hand for emergencies in the deep ocean.
  • Unlock the Repair Tool Immediately: This is critical. The Tadpole is your only way to keep it swimming after it has been battered by sea creatures or rammed into cliffs. Without the Repair Tool, your vehicle may become unusable, forcing you to dive out and fix it manually—a dangerous prospect in hostile waters.

By following these steps, you will secure the resources, construct the necessary infrastructure, and craft a Tadpole that will dramatically enhance your underwater exploration capabilities in Subnautica 2.