A Pearl is an item that is first shown in Freddi Fish and the Case of the Missing Kelp Seeds and later in SPY Fox: "Operation Ozone".
Freddi Fish and Luther can get a pearl from one of the oysters, but they will need to get past the shrimp net first. After entering through the fish net via the Super-Duper-Dooka-Booka-Poly-Gizmo, Freddi and Luther will need to play a game with the oysters in order to get the pearl. The oysters will shuffle around, and the player must remember which oyster had the pearl as they shuffle. When the correct oyster is selected, the player will earn a pearl as a prize, but he or she can only get one pearl no matter how many more times he or she plays. Doing this is optional unless Freddi and Luther need to get the bottle from King Crab.
If Freddi and Luther need to get a message bottle from King Crab, Freddi and Luther must give King Crab the pearl, so that he may give them the message bottle in return.