Arctic Pacific Sleeper Sharks Reach Lengths Comparable to a London Double-Decker Bus

An Arctic shark grows as long as a city bus in near-freezing darkness.

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Large Pacific sleeper sharks have been recorded in both the Bering Sea and the Gulf of Alaska.

Pacific sleeper sharks have been documented reaching lengths approaching 7 meters, placing the largest individuals on par with a London double-decker bus despite living in some of the coldest and deepest waters of the North Pacific and Arctic.

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In water barely above freezing and often thousands of meters deep, metabolic rates slow dramatically, yet this species still achieves sizes rivaling the largest predatory sharks found in tropical seas.

Such extreme growth in energy-poor, lightless environments challenges assumptions about size limits in deep-sea ecosystems and demonstrates that gigantism is not restricted to sunlit, food-rich waters.

Source

NOAA Fisheries

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