How many hearts does an octopus have?

Science easy Data from 2023

Guess before you scroll — the answer is below

Answer in hearts. Shorthand like 9m or 1.2bn works.

The answer

3 hearts

Roughly 3.

An octopus has three hearts and blue blood. Two pump blood to the gills and one to the rest of the body — and that one stops beating when the octopus swims, which is why they prefer to crawl.

Where this number comes from

Source National Oceanic and Atmospheric Administration
Figure refers to 2023
Last checked
Unit hearts

Numbers move. If this one has drifted from its source, let us know.

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