Octopi are highly intelligent animals.
There was a case here a few years back in the paper where a guy had one in his aquarium at home.
He, the man, would arrange the items in the aquarium a certain way and go to bed.
When he got up the next morning, the octopus had rearranged the items to its liking.
He did this several times, making different locations for the items each time, and the next morning they would be right back where the octopus wanted them.
Sounds like a game almost. He should have put lightweight toy building blocks in there and rearrange them periodically, to see what the octopus would make out of it.
Octopus in a tank, ah no thanks!
They’ll drive you nuts as they are escape artist.
They climb into your filters, get into the lights, eats you crabs and such.
Arrrggggggg No! NEVER! Will I put an octopus in my tank
Beat head on wall, fall on floor
They are very intelligent. If they don’t like their aquarium in a lab or other place, they will get out, squidge down the hall, and climb into another aquarium.
The saddest thing for their species, and why they are not the absolute kings of the seas, is that they die when they lay their eggs. They learn so much, have such powerful brains, but they are forced to start over each generation. They can’t pass anything on.