Kasuchus were a group of terrestrial and aquatic reptiles native to Nylath. They formed the dominant group of predators on the planet, with large species reaching upwards of four meters in length at adulthood. They were similar in appearance to crocodilians, and had powerful jaws in order to crush the defenses of the Tortas, their primary prey. They were hunted by Spri'leks as a delicacy and meat supplement, but were elusive and difficult to bring down.