An octopus possesses three hearts, each playing a crucial role in its circulatory system. Two of these hearts pump blood to its gills, where oxygen is absorbed, while the third circulates oxygenated blood to the rest of its body. This unique cardiovascular arrangement contributes to the octopus's remarkable adaptability and survival in diverse aquatic environments. Understanding "how many hearts does an octopus have" sheds light on its fascinating biology and evolutionary adaptations.