The mystery orcas are back in the Puget Sound. For the last few weeks, a pod of unfamiliar orcas has been coming and going ...

Southern Resident killer whales are a small and well-studied group of orcas that have long been seen as an isolated group ...

NEW ZEALAND -- Drone video captured three killer whales trailing a swimmer at Hahei Beach in New Zealand. Swimmer Judie Johnson told local media she thought the killer whales were dolphins until she ...

In the waters off British Columbia, an unusual partnership unfolds. Resident killer whales trail Pacific white-sided dolphins to hunt Chinook salmon, and may even share fish scraps with them, a new ...