Why do some animals glow in the dark? This phenomenon, called bioluminescence, is caused by a chemical reaction inside their bodies involving a molecule called luciferin. Fireflies, deep sea fish, and even some mushrooms use bioluminescence for survival. Fireflies flash to attract mates. Anglerfish use glowing lures to trap prey. And certain squids glow to camouflage against the moonlit ocean surface. What looks magical is actually chemistry in action, light created by life itself. | Auto Viral