Leviathan-class organisms

Any organism exceeding a certain size threshold is classified as "leviathan-class" by the PDA in the Subnautica franchise. These creatures range from passive filter-feeders to the most dangerous predators on their respective planets.

Subnautica 2 leviathans

Collector Leviathan

The first hostile leviathan revealed for Subnautica 2. See the full Collector Leviathan article. A squid-like predator with four main tentacles, mandible feeding tentacles, roar/shockwave attacks, and AI-driven behavior that reacts to player actions in real time. Found in the Sparse Plains biome. Cannot be killed.

One additional leviathan was cut from the Early Access scope. Its identity has not been revealed.

No-weapons philosophy

In Subnautica 2, leviathans cannot be killed. Design Lead Anthony Gallegos described lethal solutions as "boring" and confirmed the game has "no weapons, only collection tools." In the original Subnautica, players could technically kill leviathans with the survival knife or gas torpedoes, but it took extended effort and was never intended as the primary interaction. Subnautica 2 removes this option entirely.