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How many hearts does an octopus have?
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Giant Pacific octopus, Enteroctopus dofleini, with reddish textured body and extended arm showing white suction cups, rests on aquarium floor in Vladivostok, Russia.
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Giant Pacific octopus, Enteroctopus dofleini, with reddish textured body and extended arm showing white suction cups, rests on aquarium floor in Vladivostok, Russia.
Giant Pacific octopus The largest octopus species, the Giant Pacific octopus (Enteroctopus dofleini), in the Primorsky Aquarium on Russky Island, near Vladivostok, Russia.

How many hearts does an octopus have?

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An octopus has three hearts, facilitating efficient nutrient and oxygen delivery throughout its eight-armed body. It has two branchial hearts, which are specifically tasked with pumping blood through the gills, where the blood is supplied with oxygen. These complement the main systemic heart, which pumps oxygenated blood to the rest of the octopus’s body.

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