Wide Thermal Tolerance Allows Pacific Sleeper Sharks Across Polar and Temperate Seas

One giant shark tolerates temperatures from near-freezing to milder depths.

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Temperature strongly influences metabolic rates in ectothermic marine animals.

Pacific sleeper sharks occupy both frigid Arctic waters and comparatively milder deep Pacific environments, indicating a thermal tolerance that spans a significant temperature gradient.

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💥 Impact (click to read)

Shifting between near 0 degrees Celsius polar shelves and slightly warmer deep basins demands biochemical flexibility in enzymes and cellular membranes to maintain function.

This broad tolerance expands the ecological footprint of a single species across vast latitudes, illustrating how physiological adaptability supports extreme body size in diverse marine climates.

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