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Bioluminescence: Underwater Light

Dragon
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Bioluminescence: Underwater Light Empty Bioluminescence: Underwater Light

Post by Dragon Sun Aug 15, 2021 4:15 am

SourceBioluminescent organisms live throughout the water column, from the surface to the seafloor, from near the coast to the open ocean.

In the deep sea, bioluminescence is extremely common, and because the deep sea is so vast, bioluminescence may be the most common form of communication on the planet!

Animals can closely control when they light up by regulating their chemistry and brain processes depending on their immediate needs, whether a meal or a mate.

Some organisms even bundle the luciferin with oxygen in what is called a “photoprotein”—like a pre-packaged bioluminescence bomb—that is ready to light up the moment a certain ion (typically calcium) becomes present.

They can even choose the intensity and color of the lights.


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Post by Dragon Sun Aug 15, 2021 4:20 am

Bioluminescence: Underwater Light Lossless-page1-640px-Hawaiian_Bobtail_squid.tiff
By Jamie Foster

The Hawaiian bobtail squid, Euprymna scolopes, swimming in the water column off the South shore of Oahu.

As the down-welling light increases or decreases, the squid is able to adjust luminescence accordingly, even over multiple cycles of light intensity.


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Post by Dragon Sun Aug 15, 2021 4:22 am



Invisible Nature: The Glowing Squid

This tiny speckled squid (an adult is about the size of your thumb) can cruise above its prey without casting a shadow—even on a moonlight night—thanks to its relationship with a bacterial partner, Vibrio fischeri.

Juvenile bobtail squid are born without the bacteria; they recruit V. fischeri from the surrounding ocean water and then house the hitchhikers in a specialized light organ.

In exchange for room and board, the bacteria help the squid hide at night—by glowing. The light they emit blots out the squid’s shadow, letting it sneak up on prey, and hide from predators.


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