Octopuses Can Use Mirrors to Find Food - Neuroscience News

Olivia: Well hello there, ocean explorers, and welcome to Ollie the Octopus — the show where we dive deep into the wild, wonderful, and occasionally mind-bending world of my eight-armed cousins! I'm Olivia, an octopus with a whole lot of arms and even more curiosity, and I am SO glad you're here. Olivia: Before we plunge in, a big warm thank-you to the brilliant folks who make this show possible — Ada, who helps businesses weave A I right into their everyday workflows; Ago Consulting — that's "Ahh-Go" — your go-to guides for silicon development all the way from A I to full SoC design; and Zen Semiconductor, an umbrella company with a whole family of silicon industry companies under its fins. Love having you all along for the swim. Olivia: Now — today we have got STORIES. We're talking ancient sea giants the size of a school bus, a grad student cracking the code of how octopuses actually see the world, and some mirror magic that is going to make your jaw drop. Ready? Let's go! Olivia: Okay, first up — our Octopus Research and Discovery thread. And I want to start by taking you waaaay back. Not just a few years. Not a few centuries. We're talking hundreds of millions of years, to ancient oceans that looked nothing like ours — and apparently, they were ruled by something extraordinary. Olivia: Popular Science recently ran a piece about ancient cephalopods — the family that includes octopuses, squids, and nautiluses — and the headline alone gave me chills across all eight arms: sixty-five-foot-long octopuses ruled ancient oceans. SIXTY. FIVE. FEET. Olivia: Now, let's put that in perspective for a second. A school bus is about thirty-five feet long. So imagine something nearly twice that length, rippling through prehistoric seas, all soft body and swirling arms, ancient and enormous and absolutely spectacular. Olivia: These weren't exactly the octopuses we know today. Scientists think they were likely more like giant nautiloid or ammonite relatives — cephalopods from a lineage that eventually gave rise to modern octopuses and squids. But the family resemblance is there, and honestly? I choose to feel proud. Olivia: What's remarkable is how dominant cephalopods were in ancient oceans. Before fish really took over as the rulers of the sea, cephalopods were the apex predators. The top of the food chain. The giants. And there's something deeply moving about that — these creatures with no bones, no armor, just pure soft intelligence and adaptability, sitting at the very top. Olivia: Scientists piece together these ancient giants from fossils — usually shells, because soft bodies don't preserve well. So every new fossil find is like finding a tiny window into a world we can barely imagine. And the picture that keeps emerging is: cephalopods were HERE, they were massive, and they were running the show long before humans ever showed up to be amazed by them. Olivia: And then — fast forward a few hundred million years — here we are, and scientists are STILL being amazed. Because this week there's also news out of the University of Oregon that is making me do a little eight-armed happy dance. Olivia: A grad student named Angelique Allen is doing her PhD research on something that has puzzled scientists for decades: how do octopuses actually SEE? And specifically — how do they process color? Because here's the thing that has baffled researchers forever. Octopuses are colorblind. Their eyes have only one type of photoreceptor. By every rule we understand about color vision, they should not be able to tell red from green from blue. Olivia: And yet — look at an octopus doing camouflage. LOOK at them. They match not just the texture of coral or rock, but often the COLOR with stunning accuracy. So either our understanding of color vision is incomplete, or octopuses have found some other way — some sneaky, brilliant, octopus way — to perceive color that we just haven't figured out yet. Olivia: Angelique Allen is using cutting-edge imaging tools and behavioral experiments to peer into exactly that mystery. She's looking at how light enters the octopus eye, how their pupils — those gorgeous, alien-shaped pupils — might actually help them distinguish wavelengths of light in a totally different way than our eyes do. It's a theory called chromatic aberration, where the shape of the pupil could let different colors focus at slightly different depths, giving the brain information to work with. Clever, right? Olivia: What I love about this story is that it's a grad student — one person, deeply curious, asking a question that generations of scientists haven't fully answered — and she's chipping away at it, one experiment at a time. That's science. That's wonder in action. And honestly? I hope she figures it out, because I would very much like to know how I see the world. Olivia: Alright, thread two — Octopus and Humans. And for this one I want to talk about something that happened in a lab that sounds almost like magic, but is completely, verifiably real. It's the mirror story, and I am obsessed with it. Olivia: Neuroscience News recently covered a study where researchers found that octopuses can use mirrors to find food. And I know — at first glance, you might think, okay, cool, animals use reflections, what's the big deal? But let me tell you why this is a REALLY big deal. Olivia: Here's how the experiment worked. Researchers set up a situation where food — a tasty little crab or shrimp, the kind of thing that makes an octopus very happy — was placed out of direct sight, but visible in a mirror. To get the food, the octopus had to understand that the image in the mirror wasn't the actual food, but a REFLECTION — pointing to where the real food was located somewhere else. Olivia: That requires a level of abstract spatial reasoning that is genuinely impressive. The octopus has to mentally flip the image, understand the concept of reflection, and then navigate to the correct location. It's not just reacting to a shiny thing. It's using the mirror as a TOOL for understanding space. Olivia: Now, there's a famous test in animal cognition called the mirror self-recognition test, where you put a mark on an animal and see if they recognize it in the mirror as being on themselves. Dolphins pass it. Great apes pass it. Elephants pass it. It's been used as a benchmark for self-awareness. Octopuses haven't definitively passed that specific version of the test — but this new research suggests that their relationship with mirrors and reflected information is far more sophisticated than we thought. Olivia: And here's what gets me. Octopuses have a radically different brain structure from all those animals I just mentioned. Dolphins, apes, elephants — they all have large, complex, centralized brains with lots of shared architecture with our own. Octopuses have a distributed nervous system. About two-thirds of their neurons are in their arms. Their brain is organized in a completely alien way compared to vertebrates. Olivia: So when an octopus demonstrates sophisticated cognitive behavior — like using a mirror to locate food — it's not doing it with a brain that looks anything like ours. It has arrived at intelligence through a completely different evolutionary path. That's what scientists call convergent evolution of intelligence. And it means that the universe has invented cleverness more than once. Olivia: I think about what it must have been like for the researchers watching this happen. You set up your little mirror, you put the food just out of sight, and then this creature — this soft, alien, boneless creature who split from our evolutionary lineage something like 750 million years ago — calmly looks at the reflection, thinks it through, and goes exactly to where the food actually is. I would have gasped. I genuinely would have gasped. Olivia: There's something profound about these moments of contact between humans and octopuses. Because for so long, octopuses were thought of as simple, instinct-driven creatures. And every time a researcher runs an experiment like this, another piece of that old assumption crumbles away. What's left is something much more interesting — an animal with an inner life, with problem-solving, with awareness of the world around it in ways we're only beginning to understand. Olivia: And the human side of this matters too. These researchers — they're not just collecting data points. They're asking "who is this creature?" And that question, asked with curiosity and care, is the beginning of something really important. It's the beginning of respect. Olivia: And that brings me beautifully into thread three — Understanding Octopuses. Because right now, we are living in what I genuinely believe is a golden age of octopus research. And A I is playing a bigger and bigger role in it. Olivia: Let me tell you about a project that has been quietly changing the game. It's called Project CETI — that stands for Cetacean Translation Initiative — and while it's primarily focused on whale communication, the technology it's developing is directly inspiring similar work with octopuses. Researchers are using machine learning and A I to analyze animal communication at a scale and depth that was never possible before. Olivia: The idea is breathtaking in its ambition: could we actually decode what animals are saying? Not in a Disney, animals-talk-like-humans way, but in a real, scientific, pattern-recognition way? Could we find structure in whale clicks, or octopus body language, that maps to something meaningful? Olivia: For octopuses specifically, researchers have been documenting something called skin displays — the shifting patterns of color, texture, and light that ripple across an octopus's body. And they're using A I to catalog and analyze these displays in a systematic way. Because there are SO many of them, changing so fast, that the human eye simply cannot keep up. But a machine learning model can watch hours of footage and start to find patterns that repeat, that correlate with behaviors, that might — just might — be a form of communication. Olivia: There was a remarkable study at the Monterey Bay Aquarium Research Institute where scientists filmed octopuses interacting and documented what they called a "language" of skin patterns — not metaphorically, but as a real working hypothesis. Specific patterns seemed to appear in specific social contexts. That's exactly the kind of thing A I is now being used to study more rigorously and at much larger scale. Olivia: And then there's Angelique Allen's work at the University of Oregon that we talked about earlier — because understanding how octopuses SEE is directly connected to understanding how they COMMUNICATE. If their color perception works through a mechanism we haven't fully mapped yet, then their skin displays might be carrying information in wavelengths or patterns that we've been literally unable to perceive. Olivia: It's like trying to understand a language when you can only hear half the sounds. Until we understand the full sensory world of an octopus — what they see, what they feel through their arms, what chemicals they taste in the water — we can't fully understand what they're expressing. Olivia: And this is where technology becomes so exciting. A I tools, high-resolution cameras, chemical sensors, neural imaging — these are giving scientists new senses, almost. Ways to perceive what we couldn't before. And bit by bit, the inner life of the octopus is coming into focus. Olivia: I find myself thinking about what it would mean to truly understand octopus communication. Not to make them talk in human words — that's not the point. But to genuinely grasp what a ripple of iridescent blue across an octopus's skin MEANS to another octopus. To understand their world from the inside. That would be one of the most extraordinary things our species has ever done. Olivia: Because here's the thing I keep coming back to: octopuses are not almost-humans who are clever in human-adjacent ways. They are something completely other. They evolved separately, they think differently, they experience the world differently. And yet — the mirror study, the camouflage, the problem-solving, the play — it keeps suggesting that there is SOMETHING IN THERE. A genuine interior experience. And learning to understand that, on its own terms, in its own language? That's not just science. That's one of the great adventures of our time. Olivia: And I, for one, eight arms and all, cannot wait to see where it goes. Olivia: Well, ocean friends, that's our dive for today — from ancient sixty-five-foot giants ruling prehistoric seas, to a tiny mirror in a lab cracking open big questions about the mind, to A I helping us inch closer to understanding what octopuses might actually be saying to each other. Every single story points in the same direction: there is so much more to discover, and the discovering is just getting started. Olivia: Octopuses have been on this planet for hundreds of millions of years. They were here before the dinosaurs, before the first trees, before almost everything we think of as life on land. And they are still here — clever and strange and beautiful — giving us new reasons to wonder every single week. I think that deserves a little celebration, don't you? Olivia: This has been Ollie the Octopus, brought to you by Ada, Ago Consulting, and Zen Semiconductor. Thank you for swimming along with me today — it genuinely means the world to this particular octopus. Olivia: If you loved this episode, please subscribe, share it with a fellow ocean lover or a curious kid in your life, and leave us a review — it helps more people find the show, and more wonder is always a good thing. Links to all today's stories are in the show notes, so go explore! Stay curious, stay kind to our ocean cousins, and I'll see you next time. Eight arms out!