Earthen Coral Tubes (Subnautica)

The Brown Coral Tube is a type of coral. It is found in the Lava Caves, though does not currently do anything. It grows on the sides and ceiling of caves.

Appearance
Brown Coral Tubesare a somewhat round, light brown tubular coral that ranges from being short and rotund to long and skinny. They are almost always found in groups of twenty or more. The inside of each tube has an orange bioluminescent glow.