The lab in Mermaid Nature V is the Laboratory area , and players’ guides/videos point to it as a hidden underwater or escape section connected to the map teleport and cave/lab routes. The clearest clue from current public info is that the game updates mention a “Laboratory” and “New Underwater Area,” which suggests you reach it through the underwater/map transition rather than a normal surface path.

Where to look

  • Check the underwater area first, since public info links the lab with that zone.
  • Look for a map teleport or escape route tied to the lab.
  • Some guides describe solving it with a cipher decoder and related parts in the mermaid cove/lab sequence.

Practical route

  1. Enter the mermaid cove or underwater section.
  2. Search for a teleport, vent, hole, or locked passage.
  3. Follow the lab/escape puzzle items if the area is blocked.
  4. If you get trapped, the lab escape videos suggest there may be a cage or vent-style exit path.

What this means

The most likely answer is that the laboratory is not a main open-area building , but a hidden progression area tied to underwater exploration and escape mechanics. Public posts and videos also suggest there may be multiple lab-related routes depending on which version or update of Mermaid Nature you are in.

Note

Some search results mix up different Mermaid Nature versions and older/newer game pages, so the exact entrance can vary by update.