Where in the ocean are you likely to find animals that make there own light?

Animals that produce their own light, known as bioluminescent organisms, are commonly found in the deep ocean, particularly in the mesopelagic zone (200 to 1,000 meters deep) and the bathypelagic zone (1,000 to 4,000 meters deep). These depths are characterized by low light conditions, making bioluminescence an effective adaptation for communication, predation, and camouflage. Some species can also be found in shallower waters, especially in coastal regions and during specific times of the year.