Bladderfish in Subnautica: Below Zero

BladderfishOther in the game's databank. Rolled for each new game at 21 to 439 m deep.

Data: Subnautica: Below Zero game files (build of 12 Aug 2025), read and drawn by PinDrop. (c) Unknown Worlds Entertainment. PinDrop is fan-made and not affiliated with Unknown Worlds Entertainment.

Map of Subnautica: Below Zero with the Bladderfish drawn on it
heat = where it can spawn (model)Open the map on Lily Pads →
Class
Other
Depth
21 m to 439 m
Spawns per game
about 1,813
Placed pins
none

“This unusual herbivore appears to be mostly defenseless, and bears little resemblance to the other lifeforms around it.”

Assessment: Edible (oxygen may be retrieved from the bladder and added to tanks on consumption); membrane has applications as a natural water filter

Bladderfish, in-game databank. The studio's text, quoted short.

Where Bladderfish spawns

Median depth 87 m; 10% of the modelled spawns lie deeper than 439 m and 10% shallower than 21 m; the baked slots that can hold it span 761 m to +0 m.

Areas where Bladderfish can spawn
AreaSlots that can hold itExpected per gameShare
Lily Pads17,504802
Twisty Bridges7,421579
Crystal Caverns832180
Thermal Spires2,37677
Purple Vents2,63274
Glacial Bay8,72831
Glacial Basin1,80628
East Iceberg Zone2,23621
West Iceberg Zone1,0168.3
Other areas17613

Spawn numbers are a model read from the game's spawner tables and 921,892 baked slots, not verified in a running game.

In the same places

The area Bladderfish appears in most is Lily Pads. What else spawns there:

About the Bladderfish

The Bladderfish is filed under other in the game's databank. The files give it 44,727 baked slots that can hold it across 10 area groups, 1,813 expected spawns per new game, mostly in Lily Pads, at 21 to 439 m deep for the middle 80%.

The files do not say how it behaves or what it can do to the player, so this page carries only the studio's databank text above. Depths are metres below sea level; coordinates are the game's world metres, x east and z north.

Spawn numbers are a model (slot tables), not verified in a running game. Placed pins are read as placed.