Luciferins are a class of light-emitting compounds found in various organisms, including some species of fireflies and deep-sea creatures. These molecules undergo a chemical reaction that produces bioluminescence, allowing these organisms to emit light. The process typically involves the enzyme luciferase, which catalyzes the reaction, resulting in the release of energy in the form of light. The light produced by luciferins serves various purposes, such as attracting mates, deterring predators, or luring prey. Different types of luciferins exist, each with unique properties and light-emitting characteristics, contributing to the diverse range of bioluminescent phenomena observed in nature.