Record-Depth Encounters Show Pacific Sleeper Sharks Beside Human Submersibles

A bus-length shark appears outside a steel sub at crushing depth.

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Human-occupied submersibles use thick, pressure-resistant hulls to prevent implosion at great depth.

Deep-sea expeditions have documented Pacific sleeper sharks approaching submersibles at depths near 2,000 meters, calmly navigating waters that require reinforced pressure hulls for human survival.

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At these depths, external pressure exceeds 200 atmospheres, conditions that would fatally compress unprotected lungs, yet the shark’s flexible cartilage structure tolerates it naturally.

Such encounters highlight how little of the abyss is routinely explored and how giants adapted to darkness move effortlessly where humans must rely on engineered metal spheres.

Source

NOAA Ocean Exploration

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