Narwhal (Monodon monoceros): The narwhal thrives in the Arctic’s icy waters, diving under sea ice to depths over 1,500 meters in search of prey. Its thick blubber layer provides insulation against near-freezing temperatures. It navigates and survives in polar darkness using echolocation, avoiding ice entrapment. The narwhal’s physiology supports extended dives with efficient oxygen use and reduced metabolism. It maintains core temperature despite cold water exposure. Its migratory patterns follow ice movements, requiring precise timing to access breathing holes. Highly sensitive to environmental changes, it relies on stable ice conditions. The narwhal’s cold resistance is tied to its specialized marine lifestyle, making it uniquely adapted to one of Earth’s most extreme aquatic environments.
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