Giant Sidehopper

From Wikitroid, the Metroid wiki

The Giant Sidehopper is a stronger version of a Sidehopper. All Samus possesses that will kill it is the Screw Attack, but it is only encountered once in a clan of three. Two of which are avoided and the third is found in the next room preparing to attack Samus, at that time the Metroid Infant (now larger) drains it's life and it is left as a crumpled corpse.