Drone video posted online shows a rare sight: killer whales feasting on a shark in California's Monterey Bay. The photographer, hired by Monterey Bay Whale Watch, said there were at least 25 whales ...

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.

However, size alone doesn't make sperm whales immune to becoming prey themselves. Their main foes are killer whales, while ...