How Does Bioluminescence 101: Marine Animals That Glow Work?

Bioluminescence is when marine animals light up like little stars under the sea.

Imagine you're playing hide-and-seek at night, and you have a flashlight that lights up only when you need it, that’s kind of what some sea creatures do! They use special parts inside their bodies to make light, just like how fireflies glow in the summer. Some fish even have little lights along their sides, like tiny glowing stickers that turn on and off.

Inside these animals are special chemicals, one is called luciferin, and the other is luciferase. When they mix together, poof! Light appears! It’s like when you mix baking soda and vinegar and get a fizzy reaction, except this one makes light instead of bubbles.

Some animals use their glowing power to startle enemies, attract food, or even talk to each other under the sea. It's like having a flashlight in your pocket that helps you shine, hide, or even make friends!