Blood pigment helps Antarctic octopod survive cold waters

07/10/2013 | National Geographic News

Researchers have found that Antarctic octopods carry a special pigment in their blood, called haemocyanin, that enables them to survive in temperatures below freezing. It also turns their blood blue. The study found that haemocyanin may also be the key adaptation that enables octopods to survive in warmer waters near thermal vents.

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