The Kratt Bros discover a message in a bottle telling them about an old wily orca who only eats large sharks. They find this hard to believe, so with the help of Aviva's Dolphin Decoder, modified to speak Orca, the Wild Kratts go in search of the orca who likes sharks! Science Concept : Predator/Prey relationship.
Visit the Website: http://pbskids.org/wildkratts
Episode #421 / Length: 28 minutes