Hycean — Subnautica 2 Creature Guide | Location & Tips
Hycean is a passive creature in Subnautica 2 at 0–0m depth. A hydrogen-filled flying predator that drifts above the sea surface — its gas bag ignites from any spark.
Last updated: 2026-05-15
Overview
Hycean. A passive flying creature that drifts above the sea surface and snags prey with its arms, potentially suffocating larger catches by exposing them to air. Powered by bacterial symbiotes that convert ammonia into carbon nitride, which splits seawater into oxygen and hydrogen lifting gas. Critical weakness: its hydrogen gas bag ignites from any spark — electromagnetic activity during storms forces them to retreat underwater. Theorized to be unusually intelligent due to living outside water, which may support extended visual range for behavioral planning. Avoid areas directly beneath them.
Stats
| Stat | Value |
|---|---|
| Behavior | Passive |
| Depth Range | 0–0m |