David Attenborough's Life: Killer whales
Killer whales, also known as orcas, are the largest members of the dolphin family and can be found in all the Earth's oceans. They are one of the speediest mammals in the sea; the fastest speed ever recorded is an amazing 34.5mph.
Photo credit: BBC. Watch David Attenborough's Lifeon BBC1 and BBC HD at 9pm, Mondays. Missed an episode? Catch it on iPlayer.
