Nature's Greatest Moments - Episode 81: Whales

Whales are mammals that spend their lives entirely in water – and that means they can grow to immense size. The Orca – or Killer Whale is a toothed whale – and is such an efficient predator it can kill other whales bigger than itself. Sperm whales are the

offthefencenaturesgreatestmoments | February 20, 2009

Tags:. .orca. .mammals. .sperm. .bigger. .toothed