Does an octopus really have three hearts?

Yes, Finding Dory is right about this. Having multiple hearts isn't as odd as it might seem. Although one might be advised to keep one's brain and one's heart, as well as one or two other organs, separate when making important decisions, a heart and a brain are metaphorical of each other in this regard. read more

In the octopus, two hearts, called branchial hearts, pump blood through each of the two gills, and the third heard pumps blood through the rest of the body. Time Lords, such as The Doctor, have two hearts, but the evolutionary background for this is unknown. read more

Octopuses have three hearts. Two branchial hearts pump blood through each of the two gills, while the third is a systemic heart that pumps blood through the body. Octopus blood contains the copper-rich protein hemocyanin for transporting oxygen. read more

Yes, it does. Octopuses have three hearts; a systemic heart that circulates blood round the body and two branchial hearts that pump it through each of the two gills. Octopus blood contains the copper-rich protein haemocyanin to transport oxygen. 6. read more