Orcas' Sunfish-Ramming Behavior Observed Twice a Year Apart, Hinting at Learned Tradition

Scientists documented orcas ramming dead sunfish to fragmentation in the Gulf of California in July 2024 and again in September 2025, per research published in Frontiers in Ethology. Two independent sightings over a year apart suggest the cooperative behavior may be socially transmitted within pods rather than a one-off, echoing known orca cultural traditions.