Fune

From Wikitroid, the Metroid wiki

The Fune is a large stationary creature found on Zebes. It a strange creature that exists in the walls of hot caverns, all that is visible of it is its head, and mouth which spits extremely hot fireballs when the creature feels threatened. The only way to kill this creature is with a direct shot from a Super Missile. Despite their lack of eyes, they share a great resemblance with the Namihe.