Pacific Sleeper Sharks Have Been Filmed Circling Submersibles in the Abyss

A bus-sized shark glides past human explorers two kilometers down.

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Human-occupied submersibles must use thick pressure-resistant hulls to survive depths commonly inhabited by sleeper sharks.

Deep-sea exploration missions have recorded Pacific sleeper sharks approaching and circling submersibles at depths around 2,000 meters, demonstrating calm, deliberate movement in extreme pressure zones.

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At these depths, the surrounding water exerts crushing force equivalent to hundreds of atmospheres, yet the shark’s flexible cartilaginous body moves with slow precision beside metal vessels engineered to resist implosion.

Encounters between human technology and a centuries-old deep predator underscore how little of the abyss is routinely observed, and how giants adapted to darkness continue to dominate territories that remain largely unexplored.

Source

NOAA Ocean Exploration

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