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.

Ecotypes of killer whales around Hokkaido. The red regions in the top left map show the sea areas where we can frequently see killer whales. Kyoto, Japan -- The species Orcinus orca, generally known ...

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 ...