Octopuses are incredible because we've found the opposite. Octopuses are solving pretty complicated puzzles oftentimes for fun the same way people do. Cows don't. Cows do have social bonds closer to humans, though.
Could it be that the novelty of discovering that octopus, a crustacean after thought, could suddenly be as intelligent if not more than the pig (thought to be more intelligent than a canine), prevent you from consuming it? Is the irony of people shouting Octopus Lives Matter protesting against its farming but not the massive industrial scale beef/pork production capacities not clear?
Why even stop there? What if tomorrow you learn plants were able to perform puzzles and solve problems, would you view your veggies differently?
An awful criteria for determining what is morally sound to consume as food, can humans also be consumed if they are unable to solve a simple Rubrik's cube? What if they are inside a box where your perception of whether the subject is having fun or not determines their life or death, upon the latter, you are morally safe and sound in partaking in cannibalism?