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Field Report · v1

Arctic Kelp Caves

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The Arctic Kelp Caves are dark cave systems located beneath the Arctic Kelp Forests, characterized by large Kelp Roots, Sea Monkey Nests, and various resource outcrops like Calaverite.

Last refreshed May 18, 2026

Arctic Kelp Caves

Arctic Kelp Caves Biome

FeatureDetails
TypeCave
Depth Range40 - 120 meters
Biome IDkelpcave
Coordinates-532, -80, -89
MusicKelp Cave

The Arctic Kelp Caves are a group of cave systems located under the Arctic Kelp Forests. Many large Kelp Roots can be found in these caves. They are also home to Sea Monkey Nests, which serve as a source for Fragments.

There are two main cave systems situated under the two largest Arctic Kelp Forests. The western Arctic Kelp contains six entrances, while the eastern one has nine.

Description

The Arctic Kelp Cave features a dark green hue with many large Kelp Roots containing Kelp Root Pustules. The caves are illuminated by bioluminescent bulbs and Radiant Sieve Corals.

Oxygen Plants can be found throughout the cave. Calaverite Outcrops are also very common in this biome. Additionally, two Ion Cubes can be found near an Artifact Obelisk deep within the caves.

Resources

Fauna

  • Crashfish
  • Hoopfish
  • Sea Monkey
  • Spinner Fish

Flora

  • Kelp Root
  • Oxygen Plant
  • Radiant Sieve Coral
  • Sulfur Plant

Points of Interest

  • Array Module
  • Obelisk
  • Water Analysis Station
  • Monument (found deep in the caves)

Overview Overview

Large roots and pustules inside the Arctic Kelp Caves Large roots and pustules inside the Arctic Kelp Caves

A Sea Monkey in the biome holding a Scanner A Sea Monkey in the biome holding a Scanner

Ditto, but with a flashlight. Ditto, but with a flashlight.

A Sea Monkey Nest which can be found within the cave. A Sea Monkey Nest which can be found within the cave.

A Spinner Fish within the biome. A Spinner Fish within the biome.

A Crashfish within the biome A Crashfish within the biome

One of the many entrances to the area One of the many entrances to the area

A Hydrothermal Vent in the biome A Hydrothermal Vent in the biome

A Monument, found deep in the caves A Monument, found deep in the caves

Entrance to the biome Entrance to the biome

The Obelisk The Obelisk

Concept art Concept art

Trivia

The main flora species seen in this cave, the Kelp Roots, were originally created for the Kelp Forest of the first Subnautica, but were then re-skinned to become Bloodroot.

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