Nova

From Wikitroid, the Metroid wiki

Novas (Sovas in Super Metroid) are strange heat-loving creatures that have fire on their backs. In the Zebes-based Metroid games, they appear primarily in Norfair, and sometimes in Ridley's Lair.

[edit] Metroid Manual

"Their entire bodies are covered in spiky, fireproof wool and they crawl around the floor. A missile blast will kill them. If using the normal beam, it takes two blasts to kill the blue ones and four blasts to kill the yellow ones."

[edit] Gallery

Metroid	Captain N: The Game Master: The Happy Zone
	Metroid Fusion	Super Metroid	Nova concept art in Metroid Prime 2: Echoes.