Message Bottles are items that first show in Freddi Fish and the Case of the Missing Kelp Seeds.
Spongehead put the message bottles in various locations, so he wouldn't forget where the treasure full of kelp seeds were. The first message bottle is automatically obtained when Freddi Fish meets Luther and the latter hits the rock formation that was holding it. After reading the message inside, Freddi realizes that this could help them find Grandma Grouper's kelp seeds.
After Freddi and Luther leave, Spongehead and Boss arrive to the same location the bottle was at, but they can't find the bottle. Boss and Spongehead are forced to find the bottle or the Squidfather will punish them severely.
The next three bottles can be in found in different locations throughout the game. They are in the following locations:
- The Old Whale Bones
- The Junkyard
- The Volcano
- The King's Castle
- The Deep Canyon
- Under the docks near the Beach
- One of the Three Caves
If the message bottle is in the Old Whale Bones, in the volcano, or near the beach, they can be automatically obtained by clicking on them (however in order to gain access to the volcano, some purple Sea Urchins need to be thrown into the bucket to open the gate). However the other locations require some items in order to obtain them.
After the third bottle is obtained, it reveals that the treasure chest is hidden in the sunken ship. Freddi and Luther will automatically go there after finding this information.