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Thermal Spires

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The Thermal Spires is an aquatic biome in Subnautica: Below Zero characterized by tall hydrothermal stacks and geothermal activity. It serves as a primary source for late-game resources like Lithium and Magnetite, while hosting dangerous fauna such as the Rock Puncher and Cryptosuchus.

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Thermal Spires

Thermal Spires Biome

Mineral-rich crevices detected below. Geothermal activity detected. Caution advised. ― PDA

The Thermal Spires is one of the three divisions of the thermal zone. The biome contains a large amount of tall hydrothermal stacks called Hydrothermal Spires that give the biome its name.

The biome borders the Sparse Arctic, two of the Arctic Kelp Forests, Delta Island, Tree Spires, Purple Vents, and the Twisty Bridges.

Overview

PropertyDetails
CategoryBiomes
TypeAquatic
Depth Range5 - 280 meters
Biome IDthermalspires
Coordinates-140 -23 -528
Point of InterestLava Geysers (-139 -80 -516)
MusicLithium, Magnetite, Cryptosuchus

Description

The Thermal Spires is the first thermal biome the player will most likely visit and is one of the safest. The biome has many threats, most notably the Rock Puncher and the Cryptosuchus. The northern section has many trenches with a large supply of Harvesting Nodes, and contains many entrances to the Thermal Spires Caves.

The southern portion of the biome features more rugged and plateaued terrain compared to the rest of the biome. Sharing a border with the Tree Spires, flora such as the Tornado Plates, Blooming Raindrops, and Reaper's Wineglass thrive within the area, albeit to a lesser degree. In addition, Coral growths that are normally seen on the "branches" of Tree Spires flourish on the nearby Hydrothermal Spires as well. An entrance to the Koppa Mining Site can be found within a large crevice in the area.

Resources

Harvesting Nodes

Raw Materials

Fragments & Salvage

Fauna

Flora

Coral

Overview Overview

Thermal Spires at night Thermal Spires at night

Trinity Barnacles Trinity Barnacles

Thermal Zone Coral Shelf Plates Thermal Zone Coral Shelf Plates

A relative of Violet Beau A relative of Violet Beau

A Rock Puncher trundling along in the Thermal Spires A Rock Puncher trundling along in the Thermal Spires

A Rock Puncher wandering in a trench A Rock Puncher wandering in a trench

A Cryptosuchus patrolling the biome. A Cryptosuchus patrolling the biome.

A bask of Cryptosuchus scouting the trenches. A bask of Cryptosuchus scouting the trenches.

Sap oozing from the spires Sap oozing from the spires

Concept art by Pat Presley Concept art by Pat Presley

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