Yes. An octopus has three hearts — two that push blood through the gills and one larger heart that circulates blood to the rest of the body — and that body heart stops beating while the octopus swims, which is why octopuses often prefer to crawl along the seafloor instead.
The layout solves a plumbing problem. Blood that has just passed through the gills has lost most of its pressure, so it arrives at the main heart too weak to be pushed effectively around the whole body. The octopus answers that with booster pumps: one dedicated heart sits at the base of each gill and pushes blood through that gill to collect oxygen. Only then does the larger central heart take over and send the refreshed blood out to the arms, head, and organs.
Layered on top of that is the blue blood. Octopus blood uses hemocyanin, a copper-based molecule, to carry oxygen. Copper turns blue when it binds oxygen, the same way iron in human hemoglobin turns blood red. Hemocyanin performs well in cold, oxygen-poor water, but it is a less efficient carrier overall — one more reason an octopus runs on a tight energy budget.
When an octopus swims, it moves by jetting water, and during that swimming its systemic heart stops beating. With the main pump paused, oxygen delivery to the body drops right when the muscles are working hardest, and the animal tires quickly. Crawling keeps all three hearts on the job. Watch reef footage with that in mind and you will notice how often an octopus chooses a slow, deliberate walk over a swim — it is not laziness, it is engineering.
See the short version: "An Octopus Has Three Hearts — Things You Didn't Know" on LOE PRESSURE (Science #33).
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Sources: Smithsonian Magazine and Smithsonian Ocean Portal resources on octopus anatomy, hearts, and hemocyanin-based blood.