'What we know now is how much we don't know': Enter the strange world of the ocean twilight zone
CNN
Home to a host of ocean oddities and the most abundant fish on earth, scientists are racing to learn more about this underexplored environment.
The ocean twilight zone, formally known as the mesopelagic zone, exists roughly 200-1,000 meters below the surface. Home to an array of species, from the anglerfish to the vampire squid and the fairy light-like siphonophore, it's a place where oddness reigns. In the darkness eyes are small and teeth are large; many species are transparent, many bioluminescent. And in the murk, the dominant creature, the ubiquitous bristlemouth, is smaller than a human's little finger.
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