10. A Baby Octopus can be as small as your fingertip!
Female octopuses guard their eggs as long as a year. Once the eggs hatch into baby octopuses, the hatchlings swim towards the surface and join other small animals. They’re so small that they can fit to our finger tip.(source)
9. Some octopuses were seen engaging in autophagy — basically self-eating. Some say this is the result of a nerve disease. However, nobody has idea what the infection actually is.
Several octopuses were found to have eaten their own arms. Autophagy or self-eating is not a survival strategy. Most believe this is a disease that attacks the nervous system. It causes the octopus to eat itself and thus kills it off.(source)
8. Octopus wrestling was a popular sport in the 1960s. A diver would fight an octopus in shallow water and drag it to the surface.
Yeah, fighting an Octopus was once a sport. It was most popular on the West Coast of the United States during the 1960s. Annual World Octopus Wrestling Championships were held in Puget Sound in Washington. It was so popular that the event was televised and attracted thousands of spectators. Trophies were awarded to individual divers and teams that caught the largest among animals.(source)
7. It’s illegal to perform surgery on Octopuses without anesthesia in several countries. That’s because of their intelligence.
You can’t operate octopuses without anesthesia in many countries. This level of protection to experimental animals is often reserved for only vertebrates. In the UK the Octopus was the only invertebrate to be protected under the Animals (Scientific Procedures) Act, 1986 from 1993 to 2012. In 2012, the protection was extended to all cephalopods.(source)
6. With no internal or external skeleton, octopuses are able to squeeze into (and out of) spaces the size of their eye-balls.
Believe it or not, a 600 pound octopus can squeeze through a tube the size of a quarter. It’s because the octopus has no bones that it can fit into extremely small spaces. Their body holds no air bladders or gas pockets. This allows them to live at extreme depths of the oceans. In such intense pressure conditions, a normal human would burst almost instantly.(source)