In dramatic footage posted on Instagram, a massive orca spikes a hapless dolphin like it's a volleyball into the sky during a group hunt.

In a rare video captured by a whale watching expedition off the coast of San Diego this week, a killer whale teaches its baby how to hunt by headbutting a dolphin, causing it to flip several times ...

Boaters near San Diego spotted a group of Eastern Tropical Pacific Killer Whales blitz a bottlenose dolphin pod before attacking an adult.

Killer whales have been spotted hunting down dolphins - and sharing the catch with pals - for the first time. The dramatic new images of orcas in the Humboldt Current system, off Chile, show them ...

Killer whales have been spotted hunting down dolphins - and sharing the catch with pals - for the first time.

Boaters near San Diego spotted a group of Eastern Tropical Pacific Killer Whales blitz a bottlenose dolphin pod before attacking an adult.