What is the deepest-living fish?
The Mariana snailfish currently holds the record for being the deepest-living fish known to science. Individuals have been spotted at depths exceeding 8,100 metres (26,574.8 feet).
Despite its name, this fish looks like a tadpole with its oval body and long, tapering ‘tail’. In its dark habitat in the depths of the Pacific Ocean it has no need for body pigments, so its skin is translucent. It was first discovered in 2014 but was not named until 2017 after DNA analysis confirmed that it was a distinct species.
Deep-sea fish have special adaptations that allow them to live under extreme pressures, but scientists are uncertain what the maximum depth is that fish can survive at, so new species could be found at still greater depths.
The Mariana snailfish was discovered at the bottom of the Pacific Ocean in the Mariana Trench