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Very interesting post, which I appreciate.

You mentioned fluorescence, which is unlikely to be the source of light emitted by deep sea creatures, for reason you note later in the post. Fluorescence is re-emission of light. No light reaches the very deep sea. Instead the light produced by deep sea creatures is produced by a different chemical process.

"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 arthropods such as fireflies." Wikipedia

Thanks!

Sorry to hear about Your accident!
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Wishing You a Speedy Recovery!

Thank You! Have a great weekend! :-)

U-2!
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