I’ve seen videos that show frightening intelligence. The biggest limiting factor is that they don’t live very long… 2 years is well past Middle Aged.
I’ve read reports of pet octopi that are so curious they climb out of
Their tank to explore or be nearer their owner… and can’t get back in, which is fatal on a fairly short time frame
The Seattle aquarium had a weird issue with fish going missing for some time (weeks? Months?), the culprit was their octopus letting itself out at night and returning before morning.
I’ve read reports of pet octopi that are so curious they climb out of Their tank to explore or be nearer their owner… and can’t get back in, which is fatal on a fairly short time frame