Freddi Fish and the Case of the Missing Kelp Seeds

Freddi Fish visits the house of Grandma Grouper, where she learns that Grandma's treasure chest of kelp seeds which provides the food for the whole ocean has been stolen, putting the entire population in danger of starvation if the treasure is not found soon. Freddi courageously offers to find the treasure chest for Grandma Grouper. After leaving Grandma Grouper's house, Freddi meets her friend, Luther, who accidentally knocks down a bottle while trying to perform a trick. When Freddi and Luther investigate, they discover a note lodged inside, which gives clues towards more bottles that lead to Grandma Grouper's treasure chest. Upon learning from Freddi about the missing kelp seeds, Luther agrees to help her look for the treasure.
Unbeknownst to Freddi and Luther, it was two sharks named Boss and Spongehead, who were the ones that stole the treasure as part of their plan to help their boss, the Squidfather, grow kelp for themselves; Spongehead had hidden four bottles with notes in them in random locations so he could find his way back to the treasure chest. As Freddi and Luther find more of Spongehead's clues to the treasure's location, Boss becomes increasingly furious at Spongehead for not remembering where he hid the chest, so he takes him to the Squidfather as punishment for his failures. Upon finding out that Spongehead lost the treasure, the enraged Squidfather spews out ink, causing a frightened Spongehead to remember where he left the treasure chest, so he and Boss go to retrieve it. At the same time, Freddi and Luther find the last bottle, which reveals that the treasure is hidden at a sunken ship.
Upon their arrival at the sunken ship, Freddi and Luther spot the treasure inside one of the ship's rooms and, after gaining access by using a crank handle to open a window, attempt to take it, but they are stopped by Boss and Spongehead, who order them to hand it over. Freddi boldly refuses and explains that everyone can grow kelp if they share it, which the sharks agree on. While the sharks go to tell the Squidfather about their deal, Freddi and Luther take the treasure chest back to Grandma Grouper's home and spread the kelp all throughout the ocean, thus allowing everyone to enjoy the kelp. After Freddi and Luther return the treasure chest to Grandma Grouper, she invites them into her house so they can tell her about their adventure.