The Precursors were an advanced, ancient space-faring race who arrived on Planet 4546B 1000 years prior to the events of Subnautica in search of a solution to cure the infamous Carar virus. Precursors are almost 100% mystery, however a Data Bank entry claims that ninety-six years old is seen as young for a Precursor. It was also mentioned that Precursor young were grown from seeds, implying plantoid or fungoid biology. Precursors are/were (presumably) much larger creatures than humans due to the sheer size of the rooms in their bases, and most objects within. It is possible that the Precursors were biomechanical entities, however, due to the fact that a (possibly) ordinary bacterium could affect them may disprove this theory.