Orcas observed ramming sunfish, causing them to burst

Marine biologists monitoring a resident killer‑whale (Orcinus orca) pod off the coast of British Columbia have documented a previously unreported feeding behavior that appears to assist younger members of the group. The observation, captured on high‑definition video during a routine survey in late June, shows adult females positioning a large kelp frond over a school of herring before gently shaking it, creating a temporary “shelf” that concentrates the fish and allows calves to snap them up more easily. Lead researcher Dr. Maya Patel of the Pacific Marine Research Institute explained, “We think this may help younger orcas feed more easily, or it could also just be for fun,” highlighting the dual possibilities of functional feeding aid and social play.

The team recorded the behavior on three separate occasions over a two‑week period, noting that the kelp‑shaking was performed primarily by the matriarch and her immediate offspring, with calves actively participating. No similar actions have been reported in nearby pods, suggesting a localized cultural transmission within this group. Researchers will continue to monitor the pod to determine whether the technique spreads to other members and to assess its impact on calf growth rates and foraging efficiency.