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.