Phantoon is a boss that appears in the Wrecked Ship on Zebes in Super Metroid, and is one of the four main bosses that must be defeated to gain access to Tourian. Unlike the other bosses, which must be found after much exploration of their respective areas, Phantoon must be defeated before Samus can explore the rest of the Wrecked Ship. For much of the fight, Phantoon will either be invisible or intangible; it may only be damaged when he becomes completely solid and visible. It attacks using blue flames, often sending them out in a spiral pattern, a circle, in a row, or individually.
