Waste



Unidentified Substance 5 is a liquid only seen once in Metroid Prime 3: Corruption: in the G.F.S. Olympus room Disposal Chamber. The green substance is not scannable and not harmful, and the color bears a striking resemblance to US 4, though any connection is doubtful. It is presumably bits of waste and possibly even a mix of different excrements. It does not hinder Samus' movement and is drained out of the room when Samus releases the air lock.