A tree octopus is a pretend creature that someone invented. They made it up to be a type of octopus that lives in trees in the Pacific Northwest region of the United States.
But remember, tree octopuses are not real. They don't exist outside of people's imaginations and some silly websites.
Just like unicorns, dragons, and other imaginary creatures, they're fun to think about and pretend they're real. But when it comes to real life, tree octopuses aren't living creatures that you can see or touch.