Keejins, or cave crawlers to most explorers, were a species of omnivorous scavengers that could be found in the deepest caverns of many worlds and moons, including Thila and Yavin 4. Using special air filtering abilities, these animals could survive in a wide range of environments, including the innards of large spaceborne creatures such as space slugs and miner's horrors. One subspecies could even survive in the vacuum of space.