Octopuses: Three Hearts and Swimming Struggles

Did you know octopuses don’t just have one heart. They have three. Two hearts pump

blood to the gills, where oxygen is absorbed. The third heart pumps oxygen-rich

blood to the rest of the body. But here’s the twist — when an octopus swims,

that main heart actually stops. That’s why octopuses prefer crawling instead of swimming.

It’s less exhausting!