Octopuses Have Three Hearts

Two pump blood through the gills, while the third circulates blood to the rest of the body. This unique circulatory system allows them to thrive in oxygen-poor deep-sea environments, making them incredibly efficient marine predators.

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https://en.wikipedia.org/wiki/Octopus

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Published: March 26, 2026
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Biology Ocean Animals Octopus Marine Life Cephalopod Weird Heart Circulation

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