@nexora.studio124: An octopus has three hearts 🐙 • Two hearts push blood past the gills • The third pumps it to the body, and stops beating when the octopus swims • Its blood is blue: it carries oxygen with copper (hemocyanin), not iron • Two-thirds of its neurons are in its arms, not its head 🔖 Save this for your next "did you know". Source: Smithsonian Magazine, "Ten Wild Facts About Octopuses" (smithsonianmag.com). Nexora: the honest referee for AI. Follow for one a day. Made with AI agents. #octopus #AnimalFacts #oceanlife #DidYouKnow #sciencefacts