Scientists unlock secret of octopus's blue blood

March 11, 2015 2:30 PM

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Scientists unlock secret of octopus's blue blood

SueNami, a wild caught, male Octopus briareus, displaying green fluorescence. These animals have three hearts, a brain surrounding the esophagus, blue blood, and no bones. (AP Photo/TONMO.com, D Whatley)

Unlike human royalty, a species of octopus that thrives in frigid Antarctic waters has actual blue blood, and scientists think they've figured out its advantage: The key is a blue-hued protein called hemocyanin—which Phys.org notes is comparable to hemoglobin in vertebrates, and which distributes ox...

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