In this episode, when Aviva unveils her latest invention, the Dolphin Decoder, the Wild Kratts go on a mission to crack the language-code of bottlenose dolphins. After learning a few whistles and clicks, one young dolphin gets itself trapped in a shipwreck and cornered by a great white shark. To rescue the dolphin and scare away the shark, the Wild Kratts must apply what they have learned from speaking "Dolphinese."
Tropes:
- Bilingual Bonus: Aviva reveals that Spanish is her second language in this episode as she excitedly talks to the team in Spanish, forgetting that they can’t understand her.
- Friendly, Playful Dolphin: The Kratt brothers quickly make friends with two young dolphins who love to play with them.
- Heroic Dolphin: After Aviva and Koki in the Amphi-Sub go tumbling down a deep sea ravine, the group of dolphins save them using their fish-hunting techniques and bring them back up to the surface.
- Long List: Upon hearing that they will be learning how to speak “Dolphinese,” Chris unfolds a long list of all the things he’d like to say to a dolphin.
- Threatening Shark: The day is going swimmingly until one of the baby dolphins the brothers befriended starts being hunted by a shark.
