Scientists have discovered that northern resident orcas and Pacific white-sided dolphins are working together to hunt salmon off British Columbia — a surprising partnership never documented before.
Using drones, underwater cameras and acoustic tags, researchers found that dolphins often lead the chase, acting like “scouts” as they pursue large Chinook salmon. The orcas follow behind, catch the fish, and share it with their pod, while dolphins scavenge the leftovers. Remarkably, the whales show no aggression toward the dolphins, even though they normally guard fresh kills.
The two species also appear to coordinate acoustically. Tags recorded alternating echolocation clicks, suggesting they may be listening to each other and expanding their shared ability to locate prey deep underwater.
Scientists considered other explanations — such as dolphins seeking protection or simply stealing scraps — but the consistent pattern of orcas following dolphin-led hunts points to genuine cooperative behavior.
Researchers now aim to learn whether this alliance improves hunting success for both species. The findings highlight how adaptable and intelligent marine mammals are, revealing a new level of flexibility in orca hunting strategies.
