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Gricha were larval creatures used by the Yuuzhan Vong to seal holes in their grashal buildings. Gricha ate sand and secreted a shell-like substance. They were presumably a smaller form of the gragricha.
- The New Jedi Order: Dark Tide I: Onslaught (First appearance)
- The New Jedi Order: Dark Tide II: Ruin (Mentioned only)
- The New Jedi Order: The Unifying Force
- Millennium Falcon
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