10 Fascinating Ways Animals Warn Each Other of Potential Danger

7. Bioluminescence in Marine Species

Bioluminescence helps many animals communicate danger, especially in the deep sea, where darkness dominates. Some creatures, like the anglerfish, use their glow to lure prey but can also flash warnings to deter predators. Jellyfish, too, unleash sudden bursts of light to startle attackers and escape. Even on land, fireflies use bioluminescence not just for mating but also to signal distress. Whether in the ocean’s depths or the night sky, this luminous adaptation is a brilliant survival tool, proving that light can be as much a warning as it is an attraction.