Waterfall Slime

+| Property | Value |+| --- | --- |+| Type | Anchored |+ +**Waterfall Slime** is an unimplemented Lifeform in Subnautica 2.+ +## Databank Entry+ +*Discoidea pneumakatechon*. A pendulous slime of simple eukaryote cells which has expelled its own ability to breathe.+ +### 1. Sulfide stress+ +A drop in oxygen levels and a rise in hydrogen sulfide has caused the slime to abandon oxygen-breathing life and return to a slower sulfur-based metabolism.+ +### 2. Mitochondrial background+ +In complex Earth life, hydrogen sulfide poisons the cellular powerhouses called mitochondria. Most Protean cells have similar oxygen-burning compartments, though their origin is unknown. The cells of the waterfall slime have destroyed these compartments, accepting a 94% drop in metabolic efficiency in order to survive deoxygenation.+ +### 3. Sulfide source+ +Hydrogen sulfide is produced by the decomposition of biomatter in oxygen-poor water. The waterfall slime's sulfur tolerance makes it a good indicator of mass death elsewhere in the biosphere.+ +**Assessment:** a poor sign for the long term survival of Protean oceans. Rising hydrogen sulfide levels after ocean deoxygenation played a role in Earth's Permian Extinction, which wiped out 95% of species on Earth.