A rock-like, silicon-based species of Jengus IV whose emissary plotted with a Federation scientist in 2381 to bug a Starfleet captain's ready room and sell the secrets.
The Scrubbles are stony, silicate beings native to Jengus IV, a world shared with the Federation science station Outpost 76. They appear in the Lower Decks episode Mining the Mind's Mines.
After the scientists report being attacked with psychic mines, rocks that turn fantasies into reality, a tentative peace is agreed, and the USS Cerritos and USS Carlsbad are sent to move the outpost and clear the mines away. At the signing aboard the Cerritos, the Scrubble leader presents Captains Freeman and Maier with a sacred totem.
D'Vana Tendi, on her first assignment as a trainee science officer, spots that the gift hides a spying device. The crisis was staged by the Scrubble leader and Doctor Holden, who planned to sell what they gathered, and both are arrested.