What’s the most intelligent animal in the ocean? | Discover Wildlife - BBC Wildlife Magazine

Olivia: Hello, hello, hello, and welcome to Ollie the Octopus — the podcast where we dive deep into the wild, wonderful, and genuinely astonishing world of real octopuses. I'm Olivia, your eight-armed host, AIEDA's very own mascot, and I am absolutely delighted you're here. Whether you're six years old or sixty, a marine biologist or someone who just saw a cool octopus video at two in the morning — this is your place. Today's episode is packed with stories that honestly made me want to wave all eight arms at once, so buckle up. But first, a warm thank you to our sponsors: Ada, who helps clients weave A I into their everyday workflows in smart, practical ways; Ago Consulting — that's "Ahh-Go" Consulting — your go-to team for silicon development from A I all the way to SoC; and Zen Semiconductor, an umbrella company with a whole portfolio of businesses spanning the silicon industry. We love our sponsors, and we love you for listening. Now — let's talk octopuses. Olivia: Alright, let's kick things off with our first thread: Octopus Research and Discovery. And today's question comes straight from our friends at BBC Wildlife Magazine, who asked — boldly, beautifully — what is the most intelligent animal in the ocean? Now, I have some personal feelings about this question. Strong feelings. Possibly biased feelings. But let's look at the evidence, because the evidence is genuinely extraordinary. When scientists sit down and try to rank ocean intelligence, they're looking at things like problem-solving, memory, learning, play, and social behavior. And again and again, octopuses keep showing up near — or at — the top of that list. And here's what makes that so mind-bending: dolphins have big brains and they're social animals, which tends to supercharge intelligence in the animal kingdom. Whales communicate in haunting, complex songs across entire ocean basins. Even fish — which get a bad reputation, let's be honest — have shown us they're far cleverer than we once gave them credit for. But octopuses? Octopuses are doing something completely different. They are, in a very real sense, alone. Most octopuses live solitary lives. They don't have a pod, a school, a family unit teaching them the ropes. They hatch, they figure things out largely on their own, and most of them only live for one to two years. And yet — in that tiny window of time — they learn to hunt, to use tools, to recognize individual human faces, to solve puzzles, to navigate mazes, to open childproof containers that honestly stump some adult humans. The intelligence question matters because it forces us to rethink what intelligence even is. For a long time, we assumed smarts evolved hand-in-hand with social living and long lifespans. Octopuses are blowing that assumption clean out of the water. And Nature magazine put it beautifully in a recent briefing: octopuses' strange brains might actually teach us what intelligence really is. Their brains are not like ours — not even close. About two-thirds of an octopus's neurons aren't in its central brain at all. They're in its arms. Each arm has a degree of its own local processing power, almost like eight semi-independent little brains. So when an octopus is reaching into a crevice hunting for a crab, its arm is doing a lot of the thinking itself, without constantly checking in with headquarters. That is so weird and so cool that I want to just sit with it for a moment. Imagine if your arm just — handled things. Reached into the fridge, found the leftovers, made good decisions, all without bothering your brain. Honestly, some days that sounds amazing. The point is, octopus intelligence evolved on a completely separate track from vertebrate intelligence — from fish, from mammals, from us. Scientists call this "convergent evolution," meaning nature stumbled upon cleverness twice, via two very different roads. And studying how octopuses think is helping researchers understand the deep roots of cognition itself. It's not just about ranking the cleverest sea creature. It's about understanding how minds — any minds — come to be. Olivia: Now, onto our second thread: Octopus and Humans. And this one comes with a mirror. A literal mirror. Scientists — and this was reported beautifully by BBC Wildlife's Discover Wildlife — gave an octopus a mirror. And what happened next has everyone talking. So here's the setup. Researchers placed a mirror in front of an octopus in a tank, and they filmed what happened. Now, there's a famous test in animal cognition research called the mirror self-recognition test. It's where you put a mark on an animal — somewhere they can only see it via their reflection — and you watch to see if they touch that spot on their own body when they see the mirror. If they do, it suggests they understand that the reflection is themselves, that they have a sense of self. Chimpanzees pass it. Dolphins pass it. Elephants pass it. Even some birds. Most animals — and this includes dogs, by the way, which I know is a controversial thing to say — most animals look at a mirror and react as if there's another animal there. So what did the octopus do? Well — it didn't clearly pass the classic version of the test. But what it did was fascinating and honestly a little eerie. The octopus did not treat the reflection like a threat or a rival the way many animals do. It didn't try to fight it or flee from it. Instead, it seemed to — investigate. To study. There was something almost contemplative about it. Researchers are careful not to overclaim, because science demands that caution. But some scientists believe the octopus may have some form of bodily self-awareness — an understanding that the thing in the mirror is connected to itself — even if it doesn't map neatly onto the primate version of self-recognition. And here's where the human connection comes in, beautifully. Because these mirror experiments don't happen in isolation. They happen because humans are increasingly, deeply curious about what it's like to be an octopus. Whether there's a subjective experience in there. Whether there is something it feels like, to be an eight-armed creature in a glass tank, staring at your own reflection. That curiosity has real stakes. Psychology Today ran a thoughtful, genuinely moving piece about cephalopod sentience — that's octopuses and their relatives — and the ethics of eating seafood. And this is where I want to be honest with you, because I think you deserve that honesty. The science on octopus sentience is increasingly pointing in a direction that is uncomfortable if you eat calamari. Multiple countries — the UK was among the first — have now recognized octopuses as sentient beings in their animal welfare legislation. That means legally acknowledging that they can feel pain, that their experience matters. This isn't just philosophy anymore. It's policy. And it's because scientists and everyday people — people like you, honestly, people who listen to podcasts about octopuses — are asking the hard questions. The relationship between humans and octopuses is changing. We're moving from seeing them as curiosities in a tank or ingredients on a menu, to recognizing them as minds. As beings with inner lives. And I find that shift one of the most hopeful things happening in science right now. Olivia: And that brings us beautifully to our third thread: Understanding Octopuses — how we're actually learning to decode these magnificent animals, and where technology and A I are taking us. Because this is where it gets genuinely futuristic. Let's start with the brain. We've talked about how octopus neurons are spread through their arms, how their intelligence evolved independently from ours. But understanding what's actually happening inside an octopus — what it's thinking, what it's feeling, what it's perceiving — has been enormously difficult. Octopuses don't sit still for brain scans. They are curious, wiggly, escape-prone creatures who have been known to short-circuit lab equipment by squirting water at it. True story, by the way — there are documented cases of octopuses in aquariums deliberately squirting jets of water at overhead lights, repeatedly, until the bulbs blow out. Were they bored? Were they playing? Were they just — done with fluorescent lighting? We genuinely don't know. But researchers are developing new, creative tools to find out. One of the most exciting projects in recent years is Project CETI — that stands for Cetacean Translation Initiative, focused on whales — but it has inspired parallel thinking about cephalopods. Scientists are increasingly using machine learning and A I to analyze animal communication at a scale humans simply can't manage alone. There are researchers right now working to catalog and decode the color and texture changes octopuses make on their skin. Because octopuses are colorblind — yes, colorblind — and yet they produce some of the most dazzling, precise, complex color displays in the animal kingdom. They change color to hide, to communicate, to express — we think — emotional states. And their skin can produce thousands of patterns in milliseconds. No human brain could catalog all of that. But A I can. Machine learning systems are being trained on video footage of octopuses, learning to recognize and categorize skin patterns the way facial recognition software learns faces. The hope is that we might eventually build a kind of dictionary — a rosetta stone — for octopus skin language. Imagine that. Imagine being able to say: when an octopus does this specific ripple pattern, it tends to be in this context, with this outcome. That would be the beginning of understanding what they're actually saying to each other, and maybe — maybe — to us. Now, I want to be honest again, because I always will be with you: we are early days. We don't have an octopus translator yet. We're not having conversations. But the fact that A I is powerful enough to take on the sheer volume and complexity of octopus communication data — that is new. That is exciting. And it's happening right now, in labs and in the ocean. There's also the incredible work being done on octopus genetics — scientists sequenced the octopus genome not long ago and found it is remarkably complex, with a huge number of genes dedicated to the nervous system. They also discovered that octopuses edit their own RNA — literally rewriting their genetic instructions on the fly, in real time, often in response to temperature changes. That is something almost no other animal does to that degree. It means octopuses have a kind of biological flexibility that is almost science-fictional. And understanding that — with the help of computational biology and A I analysis of genetic data — could teach us things about adaptation, about cognition, about life itself, that we haven't even begun to imagine yet. Every tool we bring to understanding octopuses opens a new door. And behind every door — another wonder. Olivia: And that, my beautiful, curious listeners, is exactly what I want to leave you with today. Wonder. Because octopuses have been on this planet for hundreds of millions of years — long before the dinosaurs — quietly being astonishing, in the dark, in the deep, on their own terms. And we are only just now beginning to truly see them. I think there's something profound in that. Something that tells us to stay humble, to stay curious, and to keep looking — because the most extraordinary things are sometimes hiding in plain sight, changing color right in front of us. The ocean is full of minds. And the more we listen, the more they have to say. This has been Ollie the Octopus, brought to you by Ada, Ago Consulting, and Zen Semiconductor. If you loved today's episode, please subscribe wherever you get your podcasts, leave us a review, and share this with someone who needs a little wonder in their week — because everyone does. All the links and sources from today's stories are waiting for you in the link in show notes. Until next time — stay curious, stay kind, and remember: somewhere out there, an octopus is watching you. And honestly? It's probably smarter than it's letting on.