Scientists Filmed Orcas Ramming a Giant Sunfish So Hard It Burst Into Thousands of Pieces

Watch this: an 8-foot, 4,000-pound sunfish, held steady by one orca — and shattered into fragments by a second orca hitting it at full speed. Scientists caught it on camera, twice, and they’re still working out exactly why it happens.

Marine biologist Kathryn Ayres was shark diving in the Gulf of California in July 2024 when she witnessed the whole sequence unfold. A female orca held a dead sharp-tail sunfish in place by its tail fin — an effective grip point — while a male orca accelerated toward it and struck it head-on. Just before impact, the female let go. The result: the fish’s tissue broke apart into thousands of pieces, scattering through the water column. A second, strikingly similar event was filmed by a tour operator over a year later, in September 2025.

Here’s the fascinating part: this wasn’t the kill. Both sunfish were already dead by the time the ramming happened, so researchers believe this “ram-to-fragment” technique isn’t about delivering a killing blow — it’s about processing the meal afterward. Sharp-tail sunfish are among the ocean’s heaviest bony fish, and their odd, gelatinous bodies aren’t the easiest thing to eat. Breaking one into pieces may simply make an awkward, oversized carcass manageable for the whole group, including the pod’s younger members.

“We document how one orca holds the sunfish and lets go just before another orca hits it at high speed, causing the tissue to break apart into thousands of pieces,” said Ayres, of the ocean health nonprofit Beneath the Waves and lead author of the study, published in Frontiers in Ethology.

There may be more going on than just a meal. Ayres and her team also floated another idea: the impact may release the sunfish’s distinct microbiome — the community of microbes living in its gelatinous outer layer — into the surrounding water, potentially offering the orcas some nutritional or immune benefit through contact. And when asked what the point of ramming an already-dead fish could be, Ayres didn’t rule out the simplest explanation: “This could just be for fun — like a piñata game!”

Why it matters: Orcas are known for hunting animals as varied as rays, sharks, sea turtles, and even whales, and every documented feeding strategy like this adds real detail to how coordinated and resourceful these predators actually are — evidence of a pod working together, teaching younger members, and possibly even having fun while doing it.

Whatever the full explanation turns out to be, one thing is clear: these are animals capable of remarkable teamwork, precision, and — just maybe — a bit of play.