Fire-Sea
From Wikitroid, the Metroid wiki
The Fire-Sea is an area referred to in Metroid’s manual and the Captain N: The Game Master comic story, Money Changes Everything, on Norfair.
The room depicted in the comic has floating platforms over a lake of lava, Gamets, and an Energy Tank on a metal pedastal at the end. Such a room does exist on the lower right side of Norfair in Metroid.
[edit] Manual
Face the treacherous fire-sea of Norfair!
"If Samus falls into the fire-sea his energy seeps away. You haven't got much foot-room. The trick is to watch where you land."
