Rockmite

Rockmites were insects which could supposedly burrow into and nest inside the horns of Iktotchi suffering from horn rot. In 41 BBY, when Jedi Padawan Obi-Wan Kenobi encountered the child inhabitants of the remote planet Lenahra, he was recruited by the changeling Zae-Brii to assist in persuading the young Iktotchi Gremac to take care of his horns before going to bed. The two brought up the dangers of rockmites burrowing inside his horns if they rotted, which frightened Gremac enough that he agreed to brush his horns.

Text and facts from the “Rockmite” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.