Which deep-sea fish lives at the greatest known depths?
Quick Answer
The hadal snailfish has been found deeper than any other fish, with verified records from the Mariana Trench at around 8,000 meters and deeper.
The Full Story
The hadal snailfish is the deepest-living known fish group, with species recorded from the hadal zone, below 6,000 meters. In 2017, researchers reported a snailfish from around 8,178 meters in the Mariana Trench, one of the deepest verified fish observations ever made. These fish survive under extreme pressure, cold and darkness, making them extraordinary examples of deep-sea adaptation. Their soft bodies and specialized biology help them live where most vertebrates cannot.
Key Facts
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"The fish that lives deeper than Mount Everest is tall — by a lot."
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