In Subnautica 2, after discovering multiple Blackbox entries and learning more about the whereabouts of various colonists who came before you, your next task will be to investigate the Tadpole pens for more clues. However, there's a catch—we need a passcode to enter the facility.

Although you can explore the area's first couple of rooms, you can't fully unlock it until you find an access key to activate a locked door. Here's a deep dive on how to investigate the Tadpole Pens in Subnautica 2.

Tadpole Pens access keycode location in Subnautica 2

Investigating the Tadpole Pens requires visiting Zip's Blackbox location, 350 meters southwest of the facility. After arriving at the Tadpole Pens and exploring its interior, you'll find a separate signal marker leading you to "Blackbox – Zip." The access key is next to the Blackbox.

Screenshot by Destructoid

I recommend having access to the Tadpole mini submarine before exploring these areas. Although you can swim around, the far dis

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