WTF Fun Fact – Octopus Hearts

An octopus has 3 hearts. One pumps blood through its organs; the 2 others pump blood through its gills. When an octopus is swimming, the organ that delivers blood to the organs stops beating. This exhausts the octopus, which is likely the reason they prefer to crawl than swim.  – WTF Fun Facts

Source: Octopus Facts | Live Science

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