Clash of the titans: Amazing pictures of killer whales attacking pod of whales twice their size

[These unique pictures show the moment a group of killer whales attacked much larger sperm whales on a relentless hunting expedition.
Five orcas pursued a pod of six sperm whales, whipping up a bloody frenzy in the middle of the ocean off the coast of Sri Lanka.
The stunning images of the hunt were captured by photographer Shawn Heinrichs, a diver who found the courage to snap away just yards from the deadly fight.]
 
See here.