Scientists have documented a previously unrecorded orca feeding behavior in the Gulf of California, off Mexico's coast: one killer whale holds a dead giant sunfish in its jaws while a second orca smashes into the prey at high speed, shattering the fish into thousands of pieces. The research, titled "Fragmentation of Sharp-Tail Sunfish (Masturus lanceolatus)," was published in the journal Frontiers in Ethology after being received on March 20, 2026, and was reported on July 23, 2026, by The Guardian, The New York Times, CNN, and Ars Technica.

Dr Kathryn Ayres, a scientist at the non-profit organisation Beneath The Waves, captured the first observed ramming event on a GoPro camera in July 2024. A second instance was recorded by a tourism operator in September 2025. Both events took place in the Gulf of California The Guardian.

The prey in question is the sharp-tail sunfish (Masturus lanceolatus), a species that can grow to more than three metres long and weigh up to 2,000kg. Sunfish are a known food source for orcas. According to Ars Technica's reporting on the research, the hunting sequence begins with orcas targeting the pectoral fins (the side fins), then slashing across the body to remove the viscera — the internal organs Ars Technica.

The ramming itself follows a specific sequence. During the observed event, the first orca released the sunfish before the second orca rammed into it, causing it to fragment, The New York Times reported. After the fish broke apart, a juvenile orca began eating the floating pieces The New York Times.

Erick Higuera, a marine biologist and wildlife cinematographer at the Mexican non-profit Conexiones Terramar, is a co-author of the research. The study puts forward two hypotheses — and they are not mutually exclusive. The first is functional: smashing the sunfish apart lets adult orcas get past the prey's tough, rubbery skin so that juveniles, whose smaller jaws cannot easily tear into an intact fish, can feed Smithsonian Magazine. The second hypothesis, as The Guardian reported, is that the ramming may be a form of play, since the sunfish had already been killed before the ramming began The Guardian.

The broader context is that orca feeding strategies have long been recognized as among the most complex in cetaceans (the group that includes whales, dolphins, and porpoises). Different orca populations, known as ecotypes, use specialised, culturally transmitted techniques for catching and processing prey — skills passed from one generation to the next within family groups called pods. The ramming-fragmentation behavior adds a cooperative element not previously described in the scientific literature. The fact that a juvenile was seen eating the fragmented pieces lends some weight to the provisioning hypothesis, though the play hypothesis cannot be ruled out, since orcas across multiple populations are known to engage in object manipulation and social play with prey items.

Two observations, separated by more than a year and recorded by different parties, suggest this is not a one-off. The Gulf of California hosts both resident and transient orca populations, and the presence of juveniles in both events raises questions about whether the behavior is learned socially within pods and passed across generations — a pattern well-documented in other orca foraging traditions.

There are also methodological considerations worth noting. The first event was captured on a GoPro by a scientist; the second by a tourism operator. Citizen science and tourism-based observation have become increasingly valuable in marine ethology (the study of animal behavior), especially in regions like the Gulf of California where research vessel time is limited and orca encounters are unpredictable. But reliance on opportunistic footage means sample sizes remain small, and the authors' hypotheses are necessarily preliminary.

What remains unresolved is whether the ramming serves a primarily nutritional, social, or developmental function. The two hypotheses are not mutually exclusive: cooperative prey processing that simultaneously functions as motor-skill practice for juveniles would fit with what is known about cetacean behavioral development. Further observation, ideally with tagged individuals, would be needed to determine whether the behavior is restricted to specific pods or more widespread across orca populations in the region.