How Many Hearts Do Octopus Have?

How many hearts do octopus have? – well they have three hearts.
Indeed, the noble is because the protein, haemocyanin, which carries oxygen around the octopus' body, contains copper rather than iron like we have in our own hemoglobin.
The copper-based protein is more productive at transporting oxygen molecules in cold and low-oxygen conditions, so is ideal for life in the ocean.
An octopus' three hearts have slightly various roles. One heart circulates blood around the body, while the other two siphons it past the gills, to get oxygen.