The Ocean's Most Amazing Heart System Belongs to a Creature You'd Never Expect
Three Hearts Working As A Team: Deep beneath the ocean waves lives one of nature's most incredible animals. The octopus has not one, not two, but three hearts pumping blood through its body. This amazing system makes the octopus different from almost every other animal on Earth. While humans and most animals have just one heart, octopuses need three to survive in their underwater world.