One heart circulates blood around the body, while the other two pump it past the gills, to pick up oxygen. If the blood (called haemolymph in invertebrates) becomes deoxygenated - when the animal dies, for example - it loses its blue colour and turns clear instead.Īn octopus's three hearts have slightly different roles. The copper-based protein is more efficient at transporting oxygen molecules in cold and low-oxygen conditions, so is ideal for life in the ocean. Well, the blue blood is because the protein, haemocyanin, which carries oxygen around the octopus's body, contains copper rather than iron like we have in our own haemoglobin. More Detail: WILD HEARTS CAN’T BE BROKEN is the true inspirational story of Sonora Webster, stunt rider at Atlantic City’s Steel Pier amusement pier, and a wonderful testimony to the determination of the human spirit. Finally, why do octopuses have blue blood?Īre you still wondering why octopus blood is blue and what the three hearts do? (M) Adolescent rebellion and stubbornness. The researchers say they're not sure what the benefits of living in a densely populated settlement are for these octopuses, but it may just be a case of necessity, with limited den spaces available in the otherwise flat and featureless area. Frequent aggression, chases and even den evictions were observed among the octopuses living at Octlantis. City living has its advantages and drawbacks, as we all know.
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