Whales Speak. What Would It Mean to L… - Earth Island Institute

Marina: Welcome to Deep Voices — I'm so glad you're here. I'm Marina, a marine biologist and science communicator, and this show is my love letter to the most extraordinary communicators on the planet: whales and dolphins. Every episode, we dive into their songs, their cultures, their family bonds, and the remarkable science — including A I — that's trying to understand what they're actually saying to each other. Marina: Before we dive in today, a huge thank you to our sponsors. Ada, who helps businesses integrate A I into their workflows in ways that actually make sense. Ago Consulting — pronounced "Ahh-Go" — silicon development consultants covering everything from A I to SoC. And Zen Semiconductor, an umbrella company with a whole portfolio of businesses across the silicon industry. We couldn't make this show without them. Marina: And today — oh, today is a good one. We've got sperm whales and their mysterious alphabet, a team of scientists who just won a hundred thousand dollars for decoding dolphin whistles, a story about how human activity is quietly reshaping dolphin social lives, and — I promise this is real — a dolphin named Bubbles who figured out how to terrorize a fish into vomiting up its lunch. We're going to have fun today. Marina: Okay. Let's start where I always want to start. With the voices themselves. Marina: Thread one. Voices of the Deep. Marina: I want you to picture the ocean at depth. Not the bright, turquoise shallows — I mean the real deep. Where sunlight gives up. Where the water is cold and heavy and dark, and the pressure would crush a car. This is where sperm whales live, and this is where they talk. Marina: Sperm whales are the largest toothed animals on Earth. The males can grow to eighteen meters — that's nearly sixty feet. They have the biggest brains of any creature that has ever lived on this planet. And they communicate using something called codas — short, rhythmic patterns of clicks. Think of it a bit like Morse code, but produced by an organ in their enormous, oil-filled foreheads called the spermaceti organ. The sounds are extraordinarily loud. Some estimates put sperm whale clicks among the loudest biological sounds ever recorded. Marina: Now, for a long time, researchers knew these codas existed. They'd been catalogued, studied, mapped. Scientists knew that different clans of sperm whales used different coda repertoires — like regional accents, or maybe something deeper than accents. But the structure underneath the codas? That remained elusive. Until recently. Marina: A team at MIT, as part of Project CETI — that stands for Cetacean Translation Initiative — published research that started to crack something open. They analyzed thousands of sperm whale codas recorded in the Eastern Caribbean, and what they found was astonishing in its complexity. The clicks aren't just random patterns. They have what the researchers describe as a combinatorial structure — meaning the whales appear to be combining elements in ways that could dramatically expand the number of distinct signals they can produce. Marina: Think about that for a second. In human language, we combine a small set of sounds — phonemes — into a virtually unlimited number of words and sentences. The question has always been: do animals do anything like that? And what Project CETI found in sperm whale codas suggests the answer might be yes. The researchers identified features they called rubato — variations in the timing and rhythm of clicks — and ornamentation — extra clicks added to a coda — and these features interact in ways that look, structurally, a lot like the kind of combinatorial richness we associate with complex language. Marina: Now, I want to be careful here, because careful is what good science asks of us. This does not mean we've translated sperm whale language. It means we've found evidence that the system is far more sophisticated than we thought. The researchers themselves are clear: they've found structure. What that structure means — what the whales are actually communicating — is still the great open question. But finding the structure is huge. It's like finding the alphabet before you can read the words. Marina: And that image — the alphabet — is one the researchers themselves used. The mysterious alphabet of sperm whales. I love that phrase, because it captures exactly where we are. We're holding these beautiful, intricate letters, and we're learning to arrange them on the page, and we don't yet know what they spell. But we're so much closer than we were. Marina: Thread two. Culture and Decoding. Marina: So we've found what might be an alphabet. Now — what do we do with it? How do we actually decode what an animal is saying? And maybe even more wild: what would it mean if we could? Marina: The Earth Island Institute posed this question directly and beautifully: whales speak. What would it mean to listen? And I think that question deserves some real sitting-with. Because it's not just a scientific question. It's a philosophical one. It's an ethical one. If we genuinely understood what a whale was communicating — if we could have something like a conversation — what obligations would that create? What would we owe them? Marina: But let's stay with the science for a moment, because the science is genuinely exciting. Project CETI is one of the most ambitious interspecies communication projects ever attempted. They're combining underwater hydrophones, bio-logging tags attached to whales, machine learning — A I — and the latest tools from natural language processing to analyze sperm whale codas at a scale never before possible. They're essentially building a dictionary, except they don't know what language they're translating, and they don't have a Rosetta Stone. Marina: What they do have is data. Thousands of hours of recordings. And they have A I systems trained to find patterns in that data that human researchers might never spot on their own. It's the same kind of A I technology that learned to play chess or translate between human languages — now being pointed at the ocean, listening. Marina: And it's not just sperm whales. A team of researchers — backed by a foundation called the Coller Dolittle Challenge — recently awarded a hundred thousand dollar prize to a group who developed a system to decode bottlenose dolphin whistles. The Guardian covered this, and the details are remarkable. Dolphins use what are called signature whistles — unique calls that function almost like names. Each dolphin develops its own signature whistle, and other dolphins use it to refer to that individual. That alone is extraordinary — the use of labels, of names, is something we thought was uniquely human. Marina: But this prize-winning team went further. They built a decoder — using A I — that could identify not just which dolphin was whistling, but begin to map patterns in how those whistles changed in different social contexts. The work is early, but the direction of travel is clear. We are getting better, fast, at reading the structure of dolphin communication. Marina: And here's the cultural dimension, because this show is called Deep Voices for a reason — it's not just about individual calls, it's about what gets passed down. Sperm whale clans maintain their coda dialects across generations. Young whales learn them from their families. Humpback whale songs spread across ocean basins like viral pop songs — one whale picks up a new phrase, and within months, whales thousands of miles away are singing it. That is culture. That is social learning. That is something we share with them, even if we haven't yet shared a conversation. Marina: What would it mean to listen? I think it would mean recognizing that the ocean has been full of voices for millions of years. Long before us. And that those voices have things to say. Marina: Thread three. Cetaceans and People. Marina: Okay. I promised you Bubbles, and I will deliver Bubbles. But first, I want to talk about something that sits heavier on my heart, because it matters. Marina: New research published recently — covered by EurekAlert — shows that human activity is reshaping dolphin social lives. Not in dramatic, headline-grabbing ways. In quiet, insidious ways. The study looked at how things like boat traffic, fishing activity, and coastal development affect the social networks of dolphin communities. And what they found is that in areas with high human activity, dolphin social bonds become more fragmented. Individuals interact less. The tight, complex social networks that dolphins depend on — for learning, for cooperation, for raising young — start to fray. Marina: This matters enormously. Because dolphins, like us, are deeply social animals. Their intelligence is not just individual — it's collective. It's distributed across their pods, across their relationships. A dolphin who loses social connections isn't just lonely in a human sense. They lose access to the accumulated knowledge of their community. They lose the cultural transmission that passes on foraging techniques, communication patterns, everything that makes them who they are as a society. Marina: We tend to think of pollution as something visible — plastic in the water, oil on the waves. But social disruption is a form of pollution too. And it's one we're only beginning to measure. Marina: I think about this every time I'm on a research vessel and we have to make decisions about how close to get, how long to stay, whether the engine noise is worth it for the data we'll collect. Those decisions matter. They accumulate. Marina: But I also want to end this thread on wonder, because wonder is what keeps us going. And that brings me to Bubbles. Marina: Bubbles is a bottlenose dolphin who was observed — and filmed — doing something that scientists described as, and I'm not editorializing here, absolutely remarkable and slightly terrifying. Bubbles had worked out that if you approach a toadfish — a species known for being able to hold its breath and resist being swallowed — with sufficient aggression, the fish will vomit up its stomach contents as a stress response. And those stomach contents? Smaller fish. Pre-digested, conveniently regurgitated lunch. Marina: People magazine covered this, and look, it sounds like a joke, but the underlying science is genuinely fascinating. This is tool-use adjacent behavior. It's not Bubbles using a physical object as a tool — it's Bubbles using behavioral knowledge, cause and effect reasoning, to manipulate another animal's physiology for food. That requires a mental model of the other animal's body. It requires planning. It requires something that looks, from the outside, a lot like cunning. Marina: And honestly? Bubbles deserves every single one of those regurgitated fish. That is elite problem-solving. I say this as someone who has, on more than one occasion, had a dolphin very clearly outsmart me during fieldwork. Marina: Dolphins are not cute. I mean — they are cute. But they're also strategic, culturally complex, deeply bonded, occasionally terrifying to toadfish, and worthy of every ounce of curiosity and protection we can give them. Marina: Which brings me, I suppose, to where I always end up. Marina: The ocean is loud with voices we are only beginning to hear. Sperm whales clicking their mysterious alphabets in the dark deep. Dolphins calling each other by name, learning from each other, disrupted by our noise and our boats, and occasionally figuring out how to weaponize the digestive systems of other fish. Humpbacks singing songs that travel thousands of miles. All of it happening, right now, beneath the surface. Marina: We are at the most extraordinary moment in the history of this science. A I is giving us tools to listen at scales and depths we never could before. Young researchers are dedicating their careers to asking what these animals are saying. And the more we learn, the more the question sharpens: what do we owe them? Marina: I think we owe them our attention. Our care. And our genuine, humble curiosity. Marina: This has been Deep Voices, brought to you by Ada, Ago Consulting, and Zen Semiconductor. If this episode moved you, or amazed you, or made you want to learn more about the voices in the deep — please subscribe, leave a review, and share it with someone who loves the ocean. All the research and sources mentioned today are in the show notes, along with the link in show notes to learn more about Project CETI and the Coller Dolittle Challenge. Marina: Stay curious. The ocean is listening.