How many hearts does an octopus have?

Three divers looking at a giant Pacific octopus (enteroctopus dofleini) in the Sea of ​​Japan. (Image credit: Alexander Semenov via Getty)

Octopuses are iconic for their eight arms. But how many hearts does one have octopus to have?

It turns out that an octopus has three hearts, Kirt Onthank (opens in new tab), an octopus biologist at Walla Walla University in Washington told Live Science. The same goes for their closest relatives, squid and cuttlefish.

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