Idea or model
Ocean zones
The ocean is layered by depth. Only the upper 200 meters gets enough light for photosynthesis, and below 1,000 meters it is completely dark.
Light made by living things. In surveys off California, about three-quarters of the observed animals could make light.Source: NOAASource: Martini & Haddock, 2017Source: Widder, 2010
Idea or model
The ocean is layered by depth. Only the upper 200 meters gets enough light for photosynthesis, and below 1,000 meters it is completely dark.
The explanations on this page are our own summaries of these sources. Follow a link to read the original; if anything here disagrees with it, the original wins. How we choose and check sources.
NOAA Ocean Exploration. oceanexplorer.noaa.gov. National Oceanic and Atmospheric Administration.
Martini S, Haddock SHD (2017). Scientific Reports 7:45750.
In 17 years of video off California, 76% of observed animals were capable of bioluminescence.
Widder EA (2010). Science 328:704-708.