Summary
- Scanning Sandspear helps unlock the Bioilluminance Passive Mode.
- You can find this creature near the Bright biome.
- In addition to Sandspeaar, scanning Electric Geordie is required to unlock the Passive Mode.
While exploring Subnautica 2, you will come across a wide variety of fauna. These creatures are not just visual additions to the world and often provide useful benefits as well. One such fish in the game is Sandspear, which is essential for unlocking a Passive Mode.
With its help, you will receive automatic bonuses that can assist with exploration and resource gathering. Additionally, you can generally find Sandspear in cavern regions and along seabeds. If you are having trouble finding it in this survival title, here is a detailed guide to help you out.
Read more: How Many Players Can Play Subnautica 2?
How To Find Sandspear in Subnautica 2

As mentioned earlier, locating and scanning Sandspear helps you progress toward unlocking one of the Passive Modes in the game. Follow these steps to find it:
- Start moving northeast from your Lifepod until your HUD reaches approximately the 70-degree direction marker.
- Once you enter the Bright biome and the landmark shown in the image above appears in front of you, dive deeper toward the bottom area. Moreover, you can also use these coordinates to reach the exact location: -328684, 429147, -70.
- At the cavern seabed, you will find the required creature. To identify Sandspear, look for its distinctive colour pattern and noticeable tail structure.
Read more: Subnautica 2: How To Get Strontium
Scanning Sandspear in Subnautica 2

After locating Sandspear, the next step is to obtain its data entry through scanning. If you do not already have a Bio Scanner, you can craft one using:
- 2x Titanium
- 2x Quartz
- 1x Basic Battery
After obtaining the scanner, follow these steps to scan the fish:
- Move close to Sandspear and equip the Bio Scanner.
- Wait for the “Scan Sandspear” prompt to appear.
- After that, interact with it to complete the scan.

By following these steps, you will complete one of the requirements for unlocking the Bioilluminance Passive Mode. This passive grants a Glow-in-the-Dark effect that can help when exploring darker regions.
FAQs
What does Sandspear unlock in Subnautica 2?
Scanning Sandspear contributes toward unlocking the Bioilluminance Passive Mode.
What ability does the Bioilluminance Passive Mode provide in Subnautica 2?
The Bioilluminance Passive Mode gives you a Glow in the Dark effect, making exploration in darker underwater regions easier.
What is the other requirement for Bioilluminance Passive Mode?
Along with Sandspear, you also need to scan Electric Geordie to unlock the Bioilluminance Passive Mode.
