The first does not contain any kind of Fauna or Drooping Stingers, but Cave Crawlers can follow the player here from the surface. The only harvesting node found in these is Shale Outcrops, but unique to the caves are 2 types of Flora: Eye Stalks and Spiked Horn Grass.
The other caves contain the rest in a good amount. One can find Ruby and Uraninite Crystals pretty easily here, and Magnetite dots the cave ceiling. There are also a few hydrothermal vents located at some points in the cave system. This cave system also contains harvestable Coral Shell Plates, unlike the other one.
Reaper Leviathans can be frequently heard roaring outside, and for good reason. It is advised to be cautious when leaving the Mountain Range Caves as you could stumble onto a Reaper Leviathan that could be close to one of the cave entrances.
- The presence of Stalactites in the caves indicate they were once dry-standing and were flooded only in a later point, several million years after they first formed.