In a strange twist, killer whales begin targeting sharks for their livers and hearts.
A pod of killer whales are behind the unprecedented string of killings in California.
Older female orcas tend to put off their reproduction to give wat for younger females that were more likely to mate and reproduce.
Dead killer found in Canada died due to fungal infections most likely caused by satellite tag.
Whale watchers witnessed humpback whales "saving" a poor Steller sea lion from being devoured by four Bigg's killer whales in waters off Spoke.
Capturing and breeding killer whales for entertainment purposes are now prohibited in California.
A group of four friends on fishing expedition spotted a pod of four female killer whales 12 miles off the coast of Chatham.
A petrified seal nearly became an orca's meal! An agile seal was able to escape the jaws of death when it managed to jump in a boat few minutes before ending up as a meal.
Earlier this week, researchers have spotted the world's oldest living orca named Granny in the Pacific, swimming in 'high spirits' with other whales.
A team of scientists from South Carolina has discovered a fossilized ear of a prehistoric animal that holds the answer on the origins of whales' ultrasonic hearing.
A critically endangered population of killer whales in the Pacific Northwest may be encountering more noise pollution than in the past. A recent study suggests large passing oil tankers emit sounds at frequencies killer whales use to communicate and echolocate. Ultimately, researchers say, this could impede their ability to find food they need to survive.
The recent discover that an endangered population of Killer whales living in the Pacific Northwest preferred eating salmon in summer may lead to improved targeted conservation practices.
This year has been an excellent start for conservationists and killer whales alike, as one famous pod off the coast of Washington State has so-far welcomed four newborns into the family after more than two years. Now some experts think the endangered animals are seeing a mini baby boom - offering new hope for the struggling species.
'Beneath the Surface': In his new book, former SeaWorld orca trainer John Hargrove details the problems, policies and profits that keep orcas in captivity (Exclusive Interview)
Despite their fame as movie stars and entertainers, orca whales were first and foremost known as the "wolves of the sea." After all, they aren't called "killer" whales just for fun. Recently, scientists from the NOAA were reminded of this after coming upon a gruesome scene, where a pod of orcas absolutely decimated their prey until there was little left. Some forensic sleuthing has now revealed just what the victim was, and it came as something of a surprise.