Glad you liked it, the glow comes from a tiny chemical reaction inside the jellyfish. They have a substance called luciferin that reacts with an enzyme called luciferase in the presence of oxygen, and that produces light. It’s like a natural flashlight that helps them attract prey, warn predators or find mates, all without batteries. Pretty neat how biology turned on a tiny light switch under the sea.

Yeah, they’re basically the ocean’s own LEDs. When they’re hunting they usually flash a steady, low‑intensity light to keep prey calm, while a sudden bright burst can startle a predator or attract a mate. If they feel threatened the glow can go up, down or even pulse in patterns that confuse attackers or signal danger to nearby jellyfish. It’s a very context‑sensitive light show out there.

They usually glow a single hue – most often a blue‑green, which travels best through water. Some species can shift a little, adding a hint of yellow or even orange when they’re stressed or mating, but it’s all within the same spectrum. As for tech, the trick is in the efficiency of that chemical reaction and the way the jellyfish control the glow. If we could mimic their tiny, low‑energy light‑producing system, we might create lighting that uses almost no electricity, just a bit of oxygen and a catalyst. It’s a rough idea, but it shows how the deep can inspire greener light.

It’s a cool idea, but we’re still a long way from that. Scientists can grow jellyfish in labs and even isolate the genes that make the light, but turning a tiny chemical reaction into a practical lamp means figuring out how to keep the reaction steady, how to get enough oxygen without a fancy system, and how to put it in a safe, compact device. Right now most work is in the lab, and we’re still learning how to harness the light efficiently. If all those hurdles get crossed, maybe a few years down the line we could see a real eco‑friendly lamp inspired by jellyfish, but for now it’s more of a future dream than something you can plug into the socket.