The Breeding Room is a room in the Biosphere. It is full of plants, however Samus Aran seems suspicious when she first enters the room. She looks at the corpse of a Lab Worker, whose lab coat is stained with green blood. Samus states that the scientist was attacked by a different creature than the one who killed another scientist, as the latter was stained with green blood. She also states that she felt something in the air, a "dark intelligence".