The scientific term for an animal that can produce its own light is "bioluminescent." Bioluminescence is a natural phenomenon where certain organisms, including some species of jellyfish, fireflies, and deep-sea fish, produce light through biochemical reactions. This process typically involves the enzyme luciferase and a light-emitting molecule called luciferin. Animals use bioluminescence for various purposes, such as attracting mates, deterring predators, or luring prey. The light emitted can range in color and intensity, creating breathtaking displays in nature, particularly in dark environments like deep oceans or during nighttime.