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The common bristlemouth is the most abundant vertebrate on the planet.

A recent expedition has revealed the some of the gleaming, glowing and fearsome-looking creatures that inhabit the zone, including a tiny fish called a bristlemouth — thought to be the most abundant vertebrate on Earth.

He also documented the bristlemouth, a finger-sized, needle-fanged, glow-in-the-dark hermaphrodite of a fish that exists in at least the trillions and is the most numerous vertebrate on Earth.

If I asked you what the most common vertebrate on Earth was, how many guesses would it take for you to think of the bristlemouth?

The tiny fish known as the bristlemouth is part of a detective story that bears on everything from feeding the planet and monitoring ocean health to learning how to better predict climate change.