The conditions in this cave support a microcosm of unique, possibly predatory lifeforms. Try to anticipate unanticipated threats.


― PDA, Dialogue


The Jellyshroom Cave is a cave system found below the Grassy Plateaus, Kelp Forest, and Safe Shallows.

An entrance can be found at coordinates 140, -86, -397


The Jellyshroom Cave is a large cavern characterized by a dense population of huge translucent, purple Jellyshrooms, along with structures such as stalactites and stalagmites.

The cave system has two predatorial species, and two prey species. The most notable of these are the Crabsnakes residing in Jellyshrooms, and the Oculus, both of which are found only in this biome.

As the Jellyshroom Cave can only be accessed from above by small openings in the ground, it is generally inaccessible to the Cyclops.

Spoiler alert: The following section contains story related material.

The second abandoned seabase built by the survivors of the Degasi can also be found in the Jelly Shroom Caves.

Data Bank Entry

Environment Log

User 'Paul Torgal' requested cross-referencing of local environment scans with ideal habitat construction conditions. Displaying results.

  • Large subterranean cavern with multiple entrances
  • Conditions support a unique microcosm of predatory lifeforms
  • Minor structural instability in cave walls
  • Extensive resource deposits

Average Environment Safety Rating: C Optimal Habitat Site Safety Rating: B

Site 7 has been selected as the optimal habitat construction site for the following reasons:

  • Close proximity to one of the cave entrances, in case of emergency
  • Medium distance from predatory organisms
  • Stable foundations on which to build
  • Ready access to materials

A signal tracking the site has been created.


For a more complete gallery, visit Jellyshroom Cave/Gallery.


  • The abundance of Stalactites suggests that these caverns were dry-standing for several million years, only later being flooded presumably when the ceiling collapsed due to erosion - this might explain why its native ecosystem is so uniquely different from all bordering biomes.
  • The ambience is the same as the Blood Kelp Zones