Bioluminescence is the production and emission of light by living organisms. It is a fascinating phenomenon found in various marine organisms such as jellyfish, fish, and some types of algae. The light is produced through a chemical reaction that involves a light-emitting molecule called luciferin and an enzyme known as luciferase. When these two substances react in the presence of oxygen, light is emitted. Bioluminescence serves different purposes in nature, including attracting prey, confusing predators, and communication among species. It is an extraordinary adaptation that allows these organisms to thrive in their environments.