An octopus is a highly specialized form of life with some impressive tricks. But that doesn't make it intelligent, just well-adpated to its environment. Nothing in TFA demonstrates even modest octopus intelligence, merely excellent specialization. The two concepts should not be confused with each other.
Humans evolved to be intelligent because their ancestors were generalists and social, and the right environmental factors forced adaptations that proved beneficial to survival. They lacked a high degree of specialization except in the area of physical endurance (not a lot of marathon runners in the natural world), and the only reason they survived was by learning how to think about cause and effect, and understand how other creatures around them thought (especially other humans). In order to hunt dangerous animals with limited physical traits, you need to coordinate an attack, which requires you understand what your hunting partners are thinking, and what they'll do next. Other animals will hunt in packs, but there doesn't seem to be a lot of thought or speculation involved, mostly trial-and-error learning and instinct. Humans are the only hunters on the planet that track prey by footprints (or hoofprints). Other predators will go after prey they can directly see, or smell, or touch, but we seem to be the only animals to have ever recognized that when another animal steps in the mud they leave an indentation that can be recognized and followed days or weeks after all scent of the animal has been blown away. Other animals can communicate, but humans seem to be the only ones to ever ask any questions. We don't just scream out into the world "I'm here!" or "There's danger!" or even "Hey I found food!", we also say things like "Why are the elephants all headed that way? Is there water over there?" and then try to find out. Elephants may remember where all the watering holes are, but humans entering a new area for the first time can find those watering holes by recognizing elephant tracks and imagining that elephants all traveling in one direction may be heading for water, without ever having even seen the elephants who left the tracks.
Once you start asking questions about the world, and trying to learn answers, that's when all the magic happens. In all our research of animal linguistics, we've never been able to find any non-human animals asking any questions. Chimpanzees can be taught enough sign language to understand and respond to questions, but they can't seem to form any of their own. Non-human animals are capable of learning from their experiences, but learning is not intelligence. Non-human animals are capable of exchanging information, but communication is not intelligence. Humans have the ability to consider the future and the past, form hypotheses, and question the nature of not only their own experiences, but those experiences of others. Intelligent animals can understand that a symbol, word, or hand motion can represent a specific kind of food. Very intelligent animals can chain together sentences like "Bob likes bananas." Only humans can say "Does Alice like bananas?" That may not seem so important, until you realize where that leads. "Bob likes bananas but Alice doesn't like bananas. Do bananas taste differently for Bob than Alice? Is her experience different than Bob's? Why is that? What is taste, anyway?"
What I do know is that octopuses don't ask questions, but they do taste delicious. I also know what taste is, and why people like different kinds of seafood, because I was smart enough to ask. I don't feel bad about eating octopus, and neither should you, but I can understand that your thinking on the subject may be different than mine. You're wrong, but I understand that some people other than me are wrong sometimes. An octopus would never even consider that your thoughts on a subject would be different than his.
Plants are intelligent too, by the way. Should we not eat them?
