🤯 Verified Fact · Ocean
Wacky WorldOceans
An octopus possesses three distinct hearts: two branchial hearts that pump deoxygenated blood through the gills, and one systemic heart that circulates oxygenated blood throughout the rest of the body. When an octopus swims, the systemic heart stops beating, which is why octopuses prefer crawling along the sea floor to conserve energy. Their blood appears vivid blue because it utilizes a copper-rich protein called hemocyanin rather than iron-based hemoglobin to transport oxygen in cold, low-oxygen marine depths.
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