The killer whale is one of the most feared predators in the ocean but Dr. Ingrid Visser is undaunted when she goes Swimming With Killer Whales.
One of the most wide-spread mammals on the planet, they inhabit every ocean.
New Zealander Dr. Ingrid Visser is undaunted by killer whales' reputation.
How well do you know Nigel Marven's quarry; the grey whale?
Nigel Marven sets out on another adventure, this time focusing on grey whales.
Up and down the coastline, Nigel Marven meets whale-watchers, scientists and researchers.
Following Canadian scientists as they uncover a buried skeleton of a blue whale.
A clip from the David Attenborough's Natural Curiosities episode A Curious Twist Clip.
The spiral tusk typifies this extraordinary whale.
Dolphins are a kind of toothed whale and are incredibly intelligent.
The cetaceans include both the baleen and toothed whales.