Giant Pacific octopus The largest octopus species, the Giant Pacific octopus (Enteroctopus dofleini), in the Primorsky Aquarium on Russky Island, near Vladivostok, Russia. (more) How Many Hearts Does an Octopus Have? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/science/How-Many-Hearts-Does-an-Octopus-Have Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar Correction Link Correction Additional Information Other Your Feedback Submit Feedback Thank you for your feedback Our editors will review what you’ve submitted and determine whether to revise the article.

　　External Websites Ask the Chatbot a Question Written by The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... The Editors of Encyclopaedia Britannica Last Updated: Aug 28, 2025 • Article History Table of Contents Table of Contents Ask the Chatbot An octopus has three hearts, facilitating efficient nutrient and oxygen delivery throughout its eight-armed body. It has two branchial hearts, which are specifically tasked with pumping blood through the gills, where the blood is supplied with oxygen. These complement the main systemic heart, which pumps oxygenated blood to the rest of the octopus’s body. ...(100 of 54 words)

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