Quran 24:40
Or like the depths of darkness in a vast deep ocean, overwhelmed with waves topped by waves, topped by clouds: depths of darkness, one above another: if a man stretches out his hand, he will not see it! If Allah does not give light to a person he will not have light!

• In this verse, it is stated: ‘If a man stretches out his hand, he will not see it! If Allah does not give light to a person, he will not have light.’ This verse suggests that even when a person’s hand is outstretched, it remains unseen without divine light. This concept parallels the scientific understanding that in the depths of the ocean, there exists light not originating from sunlight. Modern science confirms that in these deep waters, organisms can produce their own light through bioluminescence

Bioluminescence

Bioluminescence occurs widely among animals, especially in the open sea, including fish, jellyfish, comb jellies, crustaceans, and cephalopod molluscs; in some fungi and bacteria; and in various terrestrial invertebrates including insects. In marine coastal habitats, about 2.5% of organisms are estimated to be bioluminescent, whereas in pelagic habitats in the eastern Pacific, about 76% of the main taxa of deep-sea animals have been found to be capable of producing light. More than 700 animal genera have been recorded with light-producing species. Most marine light-emission is in the blue and green light spectrum. However, some loose-jawed fish emit red and infrared light, and the genus Tomopteris emits yellow light.

Reference: Wikipedia, Bioluminescence, 2023