Halfmoon
HerbivorePetitAbundantHalfmoon (tentatively *Moliform luna*). Large forage fish which strains plankton from seawater and nibbles at small growth.
Health
?5
Health
Maximum hit points. The creature dies and drops its loot when this reaches zero. Players can chip it down with knives, harpoons or vehicle-mounted weapons.
Swim speed
?5.0 m/s
Swim speed
Top movement speed underwater, in metres per second. Used when chasing prey, fleeing threats, or migrating between territory zones. For reference: the Seaglide tops out around 11 m/s.
Food pool
?100
Food pool
Hunger meter. Drains over time, refills when the creature feeds on prey or plants. When the pool empties, the creature actively hunts, which is why hungry predators are more aggressive.
Bulk
?5
Bulk
Engine mass / weight class. Drives water displacement (so creatures push you around), the carry-weight footprint when the corpse becomes an item, and AI prey-selection heuristics (bigger bulk means bigger fight).
Stats inherited from the small-creature default. Unknown Worlds hasn't shipped a per-creature override in this build.
Halfmoon field notes
Halfmoon is a petit herbivore creature in Subnautica 2, sourced from the current Early Access build. It has 5 HP, swims at up to 5.0 m/s, and consumes from a 100 food pool. Grazing fauna. Non-aggressive unless cornered.
Engages 4 target types including Player, AI.Archetype.Marrowbreach, AI.Archetype.NibblerShark, and others.
Behaviour tags from the AI archetype data: Herbivore, Small body.
Spawn locations
Known fixed spawn points for Halfmoon in the current build.
Drops & cooking
What Halfmoon yields when killed or harvested, and which recipes consume those drops.
Crafts into (9)
Moisson-lune cuitEdible fish. A bit juicier and plumpier than its cousin Halfmoon.
- MMacaron Crisp
Very salty, but the fat hides it. If you're adapted, you will not lose water through all your pores when you eat this.
Temaki des trois lunes× 3Intentionally prepared, human-digestible ration made at a fabricator.
Cérulune cuitEdible fish. A little blue. A little waxy.
- Temaki des trois lunes× 3
Intentionally prepared, human-digestible ration made at a fabricator.
Mi-lune cuitEdible fish. Minimal risk of xenogout.
- Chair séchée de mi-lune× 2
Intentionally prepared, human-digestible ration made at a fabricator.
- Temaki des trois lunes× 3
Intentionally prepared, human-digestible ration made at a fabricator.
LubrifiantGrease processed from halfmoon oils.
PDA Log
· HalfmoonHalfmoon (tentatively *Moliform luna*). Large forage fish which strains plankton from seawater and nibbles at small growth.
1. Prey fish Staple foodstuff for predators—has evolved several flee-and-hide behaviors. Edible, but a fabricator cook is recommended.
2. Separate plumbing A rigid beak protects two valves which draw in seawater for feeding. Spiracles behind the eyes feed water to internal gills for breathing.
3. Built for agility Body packed with neuromasts to detect water flow. Anterior fins have fenestrae (holes) to help them quickly reverse direction. May have evolved to maneuver in tight quarters or in dense schools of other halfmoons.
4. Peculiar nervous system Lacks reafference cancellation—can't distinguish stimuli caused by its own motions from change in the surrounding world. Easily fascinated by bright light—may even experience itself as causing the light. Sometimes behaves as if disoriented, swimming sideways without apparent benefit.
Assessment: tolerable food source.
Who Halfmoon engages
Targets halfmoon will attack on sight or while threatened.
- ●Player
- ●AI.Archetype.Marrowbreach
- ●AI.Archetype.NibblerShark
- ●Tadpole
Last updated 2026-05-14