why does bioluminescence occur
Bioluminescence is defined as the emission of light from a living organism that functions for its survival or propagation. It is a cold light, resulting from a specific biochemical mechanism involving chemical processes, often specific for that organism.
Bioluminescence is a form of chemiluminescence where light energy is released by a chemical reaction. Fireflies, anglerfish, and other organisms produce the light-emitting pigment luciferin and the enzyme luciferase. Luciferin reacts with oxygen to create light: