Colossal Squid Live in the Freezing Depths of the Southern Ocean

Colossal squid thrive in water temperatures that hover near the freezing point of seawater.

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Most known specimens have been recovered from the stomachs of sperm whales hunted in Antarctic regions.

Mesonychoteuthis hamiltoni inhabits Antarctic waters where temperatures can drop below 0 degrees Celsius due to salt content. Their physiology includes slow metabolism and adaptations that allow survival under extreme cold and pressure.

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Cold water increases oxygen solubility, which may support the squid's large body size. However, the metabolic cost of maintaining muscular function in such conditions requires highly efficient energy usage.

Studying these adaptations helps scientists understand how life persists in polar marine ecosystems increasingly affected by climate change.

Source

Smithsonian Ocean Portal

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