Transport Tunnel B is a room in the Tallon Overworld. It appears in Metroid Prime. It is a rock cavern with a number of Zoomers moving around its walls and floor. A bridge allows passage over a shallow pit in the center, in which there is white smoke (most likely from the heat of the nearby Magmoor Caverns), and an alcove in the ceiling contains some Sap Sacs.
- Missile Expansion
- This is found in the pit below the stone bridge, in the middle of the room.