Jellyshroom Caves
Underground cave system filled with glowing jellyshrooms. Contains unique resources and story elements.
Quick Info
Overview
The Jellyshroom Caves are a hidden underground system reached through entrances in the Grassy Plateaus and the fringes of the Kelp Forest. Descending through the rocky shafts, the tunnels open into vast chambers filled with towering jellyshrooms, their pulsing pink caps casting a soft bioluminescent glow across the cavern walls. It is one of the most atmospheric locations in Subnautica 2.
Beneath the beauty lies real danger. Crabsnakes lurk inside the jellyshrooms themselves, bursting out to ambush anything that ventures too close. The enclosed caverns make evading them harder than open-water predators, so a Seamoth is strongly recommended both for protection and for the quick retreats the tight spaces demand. A repair tool keeps your vehicle intact between encounters.
The caves are a critical destination for two reasons. They hold Cyclops fragments needed to construct the game's signature submarine, and they contain alien artifacts that advance the story. Rare materials unique to the cave system round out the rewards, making the Jellyshroom Caves a high-value target for players ready to push past the mid-game plateau.
Resources Found Here
The Jellyshroom Caves hold resources you will not find in any surface biome. Cyclops fragments unlock the game's signature submarine, rare cave materials feed advanced recipes, and alien artifacts drive the story forward.
Creatures Found Here
The defining creature of the Jellyshroom Caves is the Crabsnake, which conceals itself inside the jellyshrooms and ambushes anything that strays too close. Spotting the occupied shrooms before you reach them is the key to surviving the caverns.
Exploration Tips
Spot occupied jellyshrooms
Crabsnakes hide inside specific shrooms. Watch for subtle movement or distortion before approaching, and give occupied shrooms a wide berth.
Bring a Seamoth
The tight caverns make escaping a Crabsnake on foot difficult. A Seamoth absorbs hits and gives you a safe bubble to retreat to between scans.
Repair after ambushes
Crabsnake attacks dent your Seamoth. Carry a repair tool and patch up immediately so minor damage never snowballs into a stranded vehicle.
Scan Cyclops fragments first
Fragments are scattered through the chambers. Prioritise scanning them on each visit so you unlock the Cyclops blueprint as quickly as possible.
Points of Interest
Jellyshrooms
The towering, glowing jellyshrooms define the caverns. They light your way through the caves, but some conceal Crabsnakes, so admire them from a careful distance.
Alien Artifacts
Story-linked artifacts rest deep in the caverns. Finding them advances the narrative and often unlocks new technology, making them a primary reason to explore.
Map Locations
The Jellyshroom Caves are accessed through entrances in the Grassy Plateaus and near the Kelp Forest. Use the interactive map to pinpoint cave openings, mark Crabsnake hazards, and route to the Cyclops fragment chambers.
View on Interactive Map →Related Biomes
Frequently Asked Questions
How to find Jellyshroom Caves?
Look for cave entrances in the Grassy Plateaus and around the edges of the Kelp Forest. The openings drop into the cave system at roughly 100m and lead down into the glowing jellyshroom chambers. The interactive map can pin the exact entrance locations.
Are Jellyshroom Caves dangerous?
Moderately. Crabsnakes hide inside the jellyshrooms and ambush players that get too close, and the enclosed caverns make escaping harder than in open water. A Seamoth and repair tool are recommended so you can absorb hits and patch up between encounters.
What resources are in Jellyshroom Caves?
Cyclops fragments needed to build the game's signature submarine, rare materials unique to the cave system, and alien artifacts that advance the story. It is a key destination for both vehicle progression and narrative discovery.
Report an Error
Spotted wrong info, outdated data, or a typo? Help us keep this page accurate for the community.
Report this page