Zero-Light Navigation: Pacific Sleeper Sharks Rely on Non-Visual Senses

This giant predator hunts where sight becomes nearly useless.

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All sharks possess electroreceptors called ampullae of Lorenzini to sense electrical fields.

At depths beyond 2,000 meters, Pacific sleeper sharks operate in the aphotic zone, relying on sensory systems such as electroreception and olfaction rather than vision to locate prey.

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In total darkness, detecting faint electrical signals and chemical traces becomes more valuable than eyesight, allowing a bus-length shark to pinpoint living or dead prey in vast black waters.

This sensory adaptation demonstrates how apex predators evolve alternative detection systems when light vanishes, enabling dominance in environments that appear inhospitable to large hunters.

Source

Smithsonian Ocean Portal

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