Red Bubble

Red Bubbles are recurring enemies in the Legend of Zelda series. They are flying skulls covered in red flame.

The Legend of Zelda: Ocarina of Time and Majora's Mask
Red Bubbles occasionally spring out of fire or lava and try to dive at Link.

The Legend of Zelda: The Wind Waker and Phantom Hourglass
Red Bubbles will float around casually until they take notice of Link. After noticing Link, they move towards him to attack, cackling in the process.