Orcas, also known as killer whales, are among the most well-studied marine mammals, captivating the public and scientists alike with their intelligence, strong social bonds and complex behaviors.

The species Orcinus orca, generally known as orcas or killer whales, is made up of many genetically distinct populations ...

Biologists discovered killer whales and dolphins working together to hunt salmon, a behavior never before documented in this population.

A study comparing the nutritional demands of killer whales with the caloric content of their prey has startling implications for the potential impact of these large predators on populations of other ...

This article is from Hakai Magazine, an online publication about science and society in coastal ecosystems. Read more stories like this at hakaimagazine.com. In Joyce Wan’s 2015 picture book, The ...

A pod of Pacific white-sided dolphins off the coast of British Columbia have been observed cooperating with orcas, a traditional enemy that’s better known for taking out great white sharks than ...