Subnautica Wiki

The Hydrothermal Vent is a heat-emitting structure found deep underground. They will damage the player if they are in close proximity.

The Hydrothermal Vent also produces heat that the player can use to warm up.

Databank Entry

Hydrothermal Vent
Thermal Vent Ency.png

Hydrothermal vents are created when water filters through cracks in the planetary crust and ultimately collides with hot magma. As a result, superheated water is propelled upwards, bursting through the ocean floor.

The water temperature at the vent opening was once hot enough to melt lead; the application of temperature and pressure over time resulted in the emerging rock structure.

Despite the intense temperatures, these vents are home to their own ecosystems of life. At the bottom of the food chain, chemosynthetic microorganisms are found - lifeforms that feed off of the vent’s chemical emissions.

Source: Scan Hydrothermal Vents