Magdollite

From Wikitroid, the Metroid wiki

Found in the Norfair section of Zebes, these strange creatures are what appears to be "living" columns of magma. Normally they are found resting at the bottom of magma pools, but when something comes near it, the Magdollite will stretch itself into a tall column of magma, equel in heighth to whatever it is preparing to attack, and it will then throw part of itself at its opponent. After its attack it will sink back to the pool of magma. These creatures can be killed and can be temporarily frozen. In their combat tactics, they resemble Magmoors.