Under-Ice Hunter: Pacific Sleeper Sharks Navigate Months of Polar Darkness

A bus-length shark hunts beneath ice in months-long darkness.

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🤯 Did You Know (click to read)

During polar night, some Arctic regions experience continuous darkness for weeks or months.

Pacific sleeper sharks inhabit Arctic waters where winter brings prolonged darkness under sea ice, yet they continue feeding and navigating in conditions with virtually no sunlight for extended periods.

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💥 Impact (click to read)

In these polar regions, daylight can vanish for months, eliminating visual cues and reducing primary productivity, but this giant predator relies on non-visual senses and deep-sea adaptations to persist.

Its ability to operate through seasonal darkness and freezing temperatures demonstrates how extreme body size and sensory specialization allow apex predators to function where entire ecosystems slow dramatically.

Source

NOAA Fisheries

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