Photographer Captures Stunning Killer Whale Attack on Dolphin
 

http://www.wired.com/wiredscience/2013/05/killer-whale-flips-dolphin/?pid=6824

Dolphins are so fast, intelligent and agile that it is hard to believe
that they could be hunted and killed by another marine mammal but it
turns out that the orcas are pretty smart also, and they hunt in
packs.