Even in one organism bioluminescence can have multiple uses. In the deep sea, light is used to attract prey or a mate, to frighten away predators, to observe surroundings, or - like the bobtail squid ...

Study finds that birds-of-paradise are biofluorescent, suggesting that this "hidden" phenomenon provides enhanced signaling for hierarchy and courtship.

Lanternfish have tiny organs known as photophores, inside which a chemical reaction takes place to give off bioluminescent light. These fish live in one of the largest ecosystems on earth ...