Humpback whale 'lobtailing' in Chatham Strait. The whale brings its tail down hard on the surface of the water - a sound that can be heard for a distance of several hundred metres underwater. Taken by kayaking photographer Duncan Murrell
Whale survives harpoon attack 130 years ago to become 'world's oldest mammal'
Putting the Size of a Whale in Perspective! Roughly the size of a basketball court, the blue whale is the largest mammal known to have ever existed. Little did this kite surfer know the creature swimming just beneath him!