Numinous
Numinous › Nature › Fact
Nature

An octopus has three hearts. Two pump blood through its gills to pick up oxygen, and the third sends that oxygen-rich blood around the rest of its body, NOAA says.

1 source verified 2 min read
An octopus has three hearts. Two pump blood through its gills to pick up oxygen, and the third sends that oxygen-rich blood around the rest of its body, NOAA says.ILLUSTRATION · AI

An octopus has three hearts, NOAA's National Ocean Service says.

Two of an octopus's hearts pump blood to the gills, where it collects oxygen so the animal can breathe.

The third heart circulates the oxygenated blood throughout the rest of the body.

SourcesEvery claim traced
Advertisement
Keep reading

More facts

In ideal conditions, kelp can grow up to 18 inches in a single day. Kelp forests provide food and shelter for thousands of species, NOAA says.
Nature

In ideal conditions, kelp can grow up to 18 inches in a single day. Kelp forests provide food and shelter for thousands of species, NOAA says.

Verified2 min
Gray whales travel about 10,000 miles round-trip every year, and some go more than 14,000, one of the longest annual migrations of any mammal, NOAA says.
Nature

Gray whales travel about 10,000 miles round-trip every year, and some go more than 14,000, one of the longest annual migrations of any mammal, NOAA says.

Verified2 min
About half of Earth's oxygen production comes from the ocean. Tiny Prochlorococcus bacteria account for up to 20% of global oxygen production, NOAA says.
Nature

About half of Earth's oxygen production comes from the ocean. Tiny Prochlorococcus bacteria account for up to 20% of global oxygen production, NOAA says.

Verified2 min