What is Bioluminescence?

Bioluminescence is when living things light up on their own, like tiny flashlights inside them.

Imagine you have a flashlight in your hand, and every time you move, it flickers, that’s kind of what bioluminescent creatures do. Some little sea animals, like tiny jellyfish, or even some kinds of plankton, glow when they swim or get bumped.

Inside these creatures are special parts that act like tiny chemical factories. When they mix together, they make light, just like how a match lights up when you strike it. This glowing helps them find friends, scare away enemies, or even trick bigger animals into thinking they’re bigger than they really are.

If you ever swam in the ocean at night and saw blue sparkles floating around you, that’s bioluminescence! It's like having a whole sky of little glowing stars moving with you through the water.