One of the vast and overwhelming subject is Ocean. Sailors experience and witness enormous mysteries under the water, all around the world. Experts have analysed the top 10 uncovered phenomena. In this edition, we take up Bioluminescence phenomenon.
Bioluminescence is the production and emission of light by a living organism. It is a form of chemiluminescence. Bioluminescence occurs widely in marine vertebrates and invertebrates, as well as in some fungi, microorganisms including some bioluminescent bacteria and terrestrial invertebrates such as fireflies.
Bioluminescence is a “cold light”. Cold light means less than 20% of the light generates thermal radiation or heat.
Most bioluminescent organisms are found in the ocean. These bioluminescent marine species include fish, bacteria, and jellies. Some bioluminescent organisms, including fireflies and fungi, are found on land. There are almost no bioluminescent organisms native to freshwater habitats.
The appearance of bioluminescent light varies greatly, depending on the habitat and organism in which it is found.
Most marine bioluminescence, for instance, is expressed in the blue-green part of the visible light spectrum. These colors are more easily visible in the deep ocean. Also, most marine organisms are sensitive only to blue-green colors. They are physically unable to process yellow, red, or violet colors.
Most organisms, however, use their light organs to flash for periods of less than a second to about 10 seconds. These flashes can occur in specific spots, such as the dots on a squid. Other flashes can illuminate the organism’s entire body.
Bioluminescence is used by living things to hunt prey, defend against predators, find mates and execute other vital activities.
Disclaimer: This video is intended for informational purpose only. This may not be construed as a news item or advice of any sort. Please consult the experts in that field for the authenticity of the presentations.
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Source: National Geographic