The exogorth, colloquially known as the space slug, was a gigantic species of toothed gastropod. They were silicon-based lifeforms that survived in the vacuum of space by making their homes in the caverns and craters of asteroids. They fed on the minerals of asteroids, various stellar energy fields, mynocks (another silicon-based lifeform), ships, and other unfortunate creatures that unknowingly passed into its mouth. The average adult space slug grew to about 10 meters in length, however there had been instances of near-kilometer long specimens. Some slugs were known to continuously grow to sizes that rivaled capital ships in sheer bulk, with some weighing over a million kilograms.