Orcas Use Coordinated Ramming to Shatter Sunfish in Newly Documented Behavior

A sunfish hangs motionless in the mouth of an orca near the surface of the Gulf of California. Then, in a coordinated instant, the whale releases it directly into the path of a second orca rocketing up from below. The collision is violent and complete—the sunfish disintegrates into fragments, and a younger pod member glides in to feed on the scattered pieces. Tourists with cameras captured this moment in July 2024, and again in September 2025. What they documented, now published in the journal Frontiers in Ethology, is a hunting behavior never before recorded by science: what researchers call "ram-to-fragment" predation.

The comparison is apt and immediate. It's like watching someone swing a bat at a piñata, except the piñata is a living fish and the precision required is extraordinary. One orca must hold the prey steady while another accelerates from depth to deliver a strike powerful enough to shatter it on impact. The coordination speaks to something deeper than instinct—it suggests calculation, communication, and a shared understanding of what needs to happen and when.

Orca intelligence has long been recognized, but what makes this behavior significant is how it reveals the breadth of their problem-solving. Orcas, the largest dolphins on Earth, inhabit nearly every ocean and have evolved into distinct ecotypes, each with its own appearance, genetics, dialect, and hunting strategy. Antarctic orcas cooperatively herd seals onto icebergs in a technique called wave-washing. Some South American populations deliberately beach themselves to hunt sea lions in the shallows. Off the coast of South Africa, individual orcas have learned to hunt white sharks. In the South Pacific, certain groups specialize in dolphins. Australian orcas take down humpback whales and even blue whales. Others have been observed playing with sea turtles. The diversity is staggering—each population has essentially invented its own way of making a living from the ocean.

The sunfish fragmentation behavior adds another layer to this picture. Kathryn A. Ayres, leading the research team at Beneath the Waves, a nonprofit focused on ocean health, suggests several possible explanations. The most straightforward: breaking the prey into pieces ensures that all members of the pod, including younger or smaller individuals, get a share of the meal. It could also be a form of social play, a way of reinforcing bonds within the group. What matters is that it requires two adults to execute it flawlessly—one to position the prey, one to deliver the impact. The precision is not accidental.

What's equally striking is how this discovery came about. Neither a research vessel nor a dedicated scientific expedition documented it. Instead, tourists with high-quality underwater cameras happened to be in the right place at the right moment. This pattern is becoming familiar. In recent years, citizen scientists and tourism operations have captured behaviors in whales and dolphins that had never been formally described before, despite those species being among the most studied on Earth. Humpback whales, for instance, were recently documented engaging in "gaping"—opening their mouths outside of feeding contexts, in areas where they don't typically hunt. No one had formally recorded this before, even though humpbacks are watched by millions of people every year.

The implication is humbling. We are still learning the basic vocabulary of how these animals live. Every year, as cameras become cheaper and more ubiquitous, as more people venture into marine environments and share what they see, the catalog of known behaviors expands. The sunfish fragmentation technique is one data point in a much larger story: that the ocean's intelligence is far more varied and inventive than we have yet documented, and that the best way to discover it may be to simply keep watching, keep recording, and remain open to the possibility that what we're seeing has never been seen before.