Bioluminescent light is produced by a chemical reaction within a living organism. Luciferin reacts with oxygen, catalyzed by the enzyme luciferase, to create light energy.
This phenomenon occurs in many marine creatures such as jellyfish, comb jellies, sea stars, and fish, as well as terrestrial animals like fireflies and glowworms. Some fungi and bacteria are also bioluminescent.
Bioluminescence serves various functions, including defense, attracting prey, communication, and mating. It demonstrates the diversity and creativity of life on Earth.