Jellyfish are fascinating marine creatures known for their otherworldly glow.

This mesmerizing light display is a natural phenomenon called bioluminescence, which is produced by certain chemical reactions within their bodies.

Bioluminescence Explained

Bioluminescence occurs when a jellyfish's body produces a light-emitting molecule called luciferin. When luciferin reacts with oxygen, it produces light.

Some jellyfish also use a protein called GFP (green fluorescent protein), which can absorb light and re-emit it as a green glow. This glowing effect helps jellyfish in various ways, from hunting to self-defense.

Purpose of the Glow

The glow of a jellyfish serves several purposes:

Camouflage: In the deep sea, glowing helps jellyfish blend in with the faint light above, making them less visible to predators.

Attracting Prey: The glow can lure prey closer, making it easier for jellyfish to catch their next meal.

Defense: Some jellyfish use their glow to startle or confuse predators, giving them a chance to escape.

Conclusion

Lykkers, jellyfish glow as a survival strategy, using bioluminescence to navigate their underwater world. This glowing phenomenon is not just beautiful; it's a vital tool that helps jellyfish thrive in the deep ocean's mysterious depths.

Jellyfish predate dinosaurs. How have they survived so long? - David Gruber

Video by TED-Ed