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Field Report · v1

Boomerang (Below Zero)

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The Boomerang is a small, passive herbivorous fauna species found in the Arctic biomes of Subnautica: Below Zero. It is easily identifiable by its boomerang-like shape and cyan bioluminescent fin tips, serving as a common food source for players.

Last refreshed May 18, 2026

Boomerang (Below Zero)

The Boomerang is a small passive fauna species found in the Arctic regions of Planet 4546B.

Boomerang Fauna

Statistics

AttributeValue
CategoryFauna
DietHerbivore
AttitudePassive
Health30
Respawn Time300 seconds
Debug IDboomerang

Biomes

Boomerangs are commonly found in the following biomes:

  • Arctic Kelp Forest
  • East Arctic
  • Lilypad Islands
  • Main Lilypad Islands
  • Shallow Twisty Bridges
  • Thermal Spires
  • West Arctic

Appearance

The Boomerang is a small fish with a bright yellow-green center and dark green stripes along the sides and edges of its body. It is horizontally symmetrical and, as its name suggests, similar in shape to a real-life boomerang.

From the top and bottom of the Boomerang protrude long, slim, pointed fins extending diagonally backwards from its main body. The tips of these fins give off a cyan bioluminescent glow. It has four eyes, two on each side of its head, positioned respectively above and below its mouth.

Front view

Side profile

Dorsal view

Bioluminescence

Behaviour

The Boomerang sways side-to-side as it swims. If approached by the player, it will eventually flee. It is a fast swimmer.

Most active during daylight hours, the Boomerang is prone to fleeing on approach. It can be more easily observed at night when its luminescence gives it away and it seeks the shelter of the seabed.

Data Bank Entry

Data Bank Image

A herbivore encountered in large numbers, found to frequent shallow waters and move in schools.

  1. Serrated Teeth: Suggests adaptation for grinding corals other herbivores are unable to digest.
  2. Twin-fins: Unusually, this species' two fins are a cartilaginous extension of its skeleton. They are less prone to damage and provide superior propulsion, but are also harder to grow back. The bright blue tips are in fact the ends of its digestive tract, where the luminescence of the corals it consumes is most focused.

Assessment: Edible

Consumable Properties

When harvested, the Boomerang provides different nutritional values depending on the specific variant or condition, but generally serves as a source of Food and Water.

TypeDescriptionSizeBioreactor EnergyFoodWater
StandardSmall, edible prey fish.1 (1×1)+175 Energy+12-8
Variant AGood eating around the fins.1 (1×1)+131.25 Energy+21+3
Variant BTough but flavorsome. Dehydrating, but keeps well.1 (1×1)+98.7 Energy+21-2

In Arctic Kelp Forest A Boomerang in the Arctic Kelp Forest

In Lilypad Islands A Boomerang in the Lilypad Islands

In Shallow Twisty Bridges Boomerangs in the Shallow Twisty Bridges

In Thermal Spires A Boomerang in the Thermal Spires

In West Arctic A Boomerang in the West Arctic

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