Scientists have documented orcas and Pacific white-sided dolphins cooperating to hunt salmon off the coast of British Columbia — a behavior never recorded before.
Using drones, underwater cameras and acoustic tags, researchers found that northern resident killer whales were following dolphins that acted like “scouts,” chasing large Chinook salmon ahead of the whales. In return, dolphins fed on scraps once the whales tore the fish apart at the surface.
The whales showed no aggression, which surprised researchers since they normally guard fresh prey.
Audio recordings revealed alternating echolocation clicks from both species, suggesting they may be listening to each other to better track fish.
The team ruled out explanations like dolphins seeking protection or trying to steal food. Instead, the consistent pattern pointed to true cooperative hunting.
Scientists now hope to learn whether this partnership boosts hunting success.
“It shows how adaptable these predators are,” said lead author Sarah Fortune.
