Octopuses have three hearts and blue blood

Did you know that octopuses 3 hearts make them one of the most fascinating creatures in the ocean? Through their unique octopus circulatory system, they use one systemic heart to pump blood throughout their body, while two branchial heart organs supply their gills with oxygen-rich blood. As a remarkable mollusc species, they showcase nature's incredible diversity in action! 🐙🌊 #science #ocean #nature #facts #biology