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 Tubes are a kind of round, dark 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.