By Rajni Pandey | August 7, 2025
Seals can nap underwater by shutting down half of their brain at a time—this lets them rest and stay alert for predators.
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True seals (like harbor seals) lack external ears, unlike sea lions and fur seals which have visible ear flaps.
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Some seals can dive over 1,500 feet deep and hold their breath for more than an hour thanks to special oxygen-storing muscles.
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Unlike sea lions, seals don’t have rotating back flippers. So, they move on land by belly-flopping in a cute wiggle motion.
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Seals have ultra-sensitive whiskers that detect fish movements underwater, even in total darkness.
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Seal pups can pick out their mother’s call from hundreds, even in noisy, crowded colonies.
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Many seal species give birth on sea ice. Harp seal pups are born with fluffy white fur to blend in and stay warm.
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The Mediterranean monk seal is critically endangered, with fewer than 700 individuals left in the wild.
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Despite their pudgy appearance, seals can swim at speeds up to 25 mph, rivaling even some sharks.
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Seals make strange sounds—grunts, barks, even burps—and use slaps or bubbles to communicate underwater.
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