Sperm Whale Clicks — A Language of Their Own
Physeter macrocephalus
Quick Fact
Sperm whale clans have distinct click dialects passed down through generations — a form of cultural identity unique among non-human animals.
Rowan Byrne has encountered sperm whales during fieldwork in Dominica.
About This Species
Sperm whales produce the loudest sounds of any animal — powerful clicks used for echolocation to hunt squid in the deep ocean. But they also produce complex rhythmic patterns of clicks called codas, used for social communication. Different sperm whale clans around the world have distinct coda dialects — a form of cultural identity passed down through generations. Recent research using AI analysis has begun to decode the structure of sperm whale communication, suggesting a level of complexity approaching human language.
Why It Matters
Understanding sperm whale communication is transforming our view of animal intelligence and culture. It also highlights the devastating impact of ocean noise pollution on these animals' ability to communicate and hunt.
Transcript
Sperm whales don't just make clicks. They have a language. I've been in the water with sperm whales in Dominica, and the sound is extraordinary — a rapid series of clicks called a coda, produced by a specialised organ in their enormous heads called the spermaceti organ. It's the most powerful biological sound source on Earth. Researchers have now identified that different family groups of sperm whales have different codas — distinct dialects that are passed down through generations from mothers to daughters. Whales from the Eastern Caribbean sound different from whales in the Pacific. It's cultural transmission of communication — something we previously thought was unique to humans. A 2024 study using machine learning to analyse thousands of sperm whale codas found a combinatorial structure — meaning the clicks aren't just signals, they're combined in ways that create meaning. Like syllables in a word. We don't yet know what they're saying. But the evidence is mounting that sperm whales have a sophisticated communication system that we are only beginning to decode. Think about that. In the deep ocean, right now, sperm whale families are having conversations that have been going on for millions of years. And we nearly hunted them to silence.