This 10 August 2019 video says about itself:
The deep-sea dragonfish is a predator that lives deep in the Pacific Ocean. Like many other deep sea predators, it’s got an oversized jaw and a bioluminescent appendage to attract prey, but it does have one weird (and strangely useful) difference: its teeth are transparent!
Dear Kitty. Some blog 
These are amazing creatures. I was peripherally involved with one that was brought up in a fishing net. No one had seen one before, or knew what it was… Fascinating to research…
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Thanks for your comment! Was that in the Pacific?
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