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2. Fishing light attractor - Wikipedia

   en.wikipedia.org/wiki/Fishing_light_attractor

   Fish are most attracted to true-green light colors, and LEDs do the best job of illuminating this color. A fishing light attractor is a fishing aid that uses lights attached to structures above water or suspended underwater to attract fish and members of their food chain. Fish are typically most attracted to true-green light colors.

3. Dive light - Wikipedia

   en.wikipedia.org/wiki/Dive_light

   A dive light is routinely used during night dives and cave dives, when there is little or no natural light, but also has a useful function during the day, as water absorbs the longer (red) wavelengths first then the yellow and green with increasing depth. By using artificial light, it is possible to view an object in full color at greater depths.

4. List of bioluminescent organisms - Wikipedia

   en.wikipedia.org/wiki/List_of_bioluminescent...

   Bioluminescence is the production of light by living organisms. This list of bioluminescent organisms is organized by the environment, covering terrestrial, marine, and microorganisms. Terrestrial animals

5. Vision in fish - Wikipedia

   en.wikipedia.org/wiki/Vision_in_fish

   Shorter wavelengths penetrate further, with blue and green light reaching the deepest depths. [6] This is why things appear blue underwater: how colours are perceived by the eye depends on the wavelengths of light that are received by the eye. An object appears red to the eye because it reflects red light and absorbs other colours.

6. Counter-illumination - Wikipedia

   en.wikipedia.org/wiki/Counter-illumination

   When seen from below by a predator, the animal's light helps to match its brightness and colour to the sea surface above. Counter-illumination is a method of active camouflage seen in marine animals such as firefly squid and midshipman fish, and in military prototypes, producing light to match their backgrounds in both brightness and wavelength.

7. Anomalopidae - Wikipedia

   en.wikipedia.org/wiki/Anomalopidae

   Anomalopidae (lanterneye fishes or flashlight fishes) are a family of fish distinguished by bioluminescent organs located underneath their eyes, for which they are named. These light organs contain luminous bacteria and can be "shut off" by the fish using either a dark lid or by being drawn into a pouch. They are used to communicate, attract ...