What color is octopus blood?
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Both squids and octopuses have blue blood. They use an oxygen-carrying molecule in their blood called hemocyanin that contains copper. In cold conditions with low oxygen pressure, hemocyanin oxygen transportation is more efficient than haemoglobin oxygen transportation.
reach: rather globalanimalsbloodchemistrycolorsnatureoctopusessea animalszoology
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663
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46
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81
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