Every year on June 8, people around the world celebrate
this day, and to join in on the fun here are some mind-blowing facts about
octopuses, according to a report published in the Business Insider.
With their eight arms and giant egg-shaped head, octopuses
are one of the most alien-looking creatures on the planet.
Yet scientists have an extremely difficult time studying
them in the wild because these highly intelligent invertebrates are the
ultimate masters of disguise.
In her book, "Octopus!" Katherine Harmon Courage
travels the globe to swim, observe, and even taste some of the many octopuses
of the world. Here are 8 mind-blowing facts she learned about this squishy
predator of the sea along her epic journey.
Octopuses have three hearts. The main heart will actually
stop beating when the animal is swimming, so it can't swim very far before
tiring out.
When they do bleed, octopuses bleed blue blood, not red.
That's because their blood is high in copper instead of iron.
Over 95% of all animals on Earth are invertebrates. The
octopus is the smartest of them all and has approximately 300 million neurons
throughout its body. That's not much compared to the 100 billion in humans, but
it's a giant leap from the 16 million in frogs.
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