It is similar to the Pearly Clamclamp but is nowhere as pristine. The shell is grey instead of pink and the pearl is not shining but bubbling in a red liquid bubble. If you throw Pikmin into its mouth to damage the pearl, they will get stuck in the ooze and will not be able to escape being eaten. Throw only Black Pikmin into its mouth because they won't get stuck, then call them back before the mouth closes. Keep this up and it will cough up the pearl. Call your Pikmin out of the mouth afterwards because it can still eat Pikmin!