Scientists have documented what might be the first case of friendly interactions between killer whales and smaller cetaceans. Here's what they think is going on. Pacific white-sided dolphins swim off ...

Researchers have observed dolphins and killer whales hunting together for the first time as part of a new study released on Thursday, Dec. 11. The top predators joined forces to feast on salmon off ...

Researchers analyzed nearly 200 whale-dolphin interactions, and conclude: They sure do seem friendly. Humpback whales (Megaptera novaeangliae) like the ones pictured here with bottlenose dolphins ...

Off the coast of British Columbia, dolphins lead killer whales to salmon and earn their share of lunch, a new study reveals. A new study is the first to document cooperative hunting between orcas and ...

Killer whales and dolphins have been working together to hunt salmon in the northern Pacific Ocean, an unexpected finding that further reveals the complex social lives of marine mammals. Video cameras ...

Killer whales and dolphins have been found hunting together for the first time. Canadian scientists said the two species had developed a “strategic allegiance” to hunt salmon in deep water. A study in ...

With all the splashing, it was hard to tell what was happening under water. As the orcas surfaced to take a breath, dolphins were darting around their heads, but the water was so murky that the ...